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How it works for homeowners
This is help right here with exact instructions for the homeowner without you spending a dime on anything first and foremost. we are here to give you simple solutions that will and can help you save money and some instance to save thousands on repair cost or replace cost.
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J. Smith A satisfied homeowner in Austin, Texas
Have questions about your HVAC system, our services, or how we connect homeowners with contractors? Find answers to frequently asked questions here.
My AC does not turn on?
First check your power sources check your AC breaker and see if it tripped if so turn it off for five minutes and turn it back on. Sometimes the breaker can trip due to not having the right size breaker/ not always the case. Also check your furnace or Air handler breaker to see if it tripped. This can also be a wet switch or a float switch that will cut the power to the unit. If nothing happens after about 10 minutes we can get a Pro out to do further diagnostics. Click the link below:
My Blower is running but my outside AC does not turn on?
First make sure the AC unit breaker has not tripped if so reset it. If it does not turn on after reset. The capacitor can be dead. The capacitor is like a battery that goes out or loses it's charge over time. Some home owners like like to change the capacitor out themselves. First you have to see if the issue is the capacitor. If you do not have a meter to test the capacitor you can get one from Home Depot or our shop on HVAC-help.net only test the capacitor with out the power being on. Most Capacitors say 25+5uF or something similar. You want to test Common to Herm and then Common to Fan. A good reading would be within +or - 5-6%. It will give you all the info on the current Capacitor. After testing the Capacitor and it tests out of the range of what the current Capacitor says go to Home Depot or HVAC-help.net and get the correct size capacitor and change it out wire for wire. This is important when changing out the capacitor you want to do this wire for wire take a picture of the wires before you disconnect and either look at that picture while you're putting on the new capacitor or just take one wire off and put it on the proper place if it's common put it on common if it's herm, put it on her if it's fan put it on fan. If you need additional assistance click the link below:
My HVAC is not keeping up, not cooling or not heating.
First, let's check air flow. Let check the filters and make sure they are clean. Second, let's check the outside condenser unit coil is it dirty? If so let's clean it with just cool water. Let's see if that makes a difference. Third, go outside and put your hand above the fan if it's in cool mode the temperature of the wind coming out of the fan should be worm not cool. If it's cool sometimes off. Check the copper lines connected to the condenser unit. The large line should be Condensating. If not then we have a bigger problem. After cleaning the condenser coil, changing the filter and checking the lines you should see a difference In a few hours if not we have A Pro ready to assist you. Click the link to get a Professional HVAC Technician. How It Works (Homeowners)
Why is my HVAC making a loud or funny noise
This is a very common question. First, I would pinpoint where it's coming from. If it's coming from the return and where the filter is, I would check the filter. If the filter is dirty I would replace the filter. Second if it's coming from the filter or the area where the filter is I would check the size of the filter and make sure it is the proper size. Some filters are too small or too large. If you have to force the filter in it is not the proper size. Now if it's outside for the condensing unit and it's making a rattling noise, I would check all of my screws on the outside of that unit to make sure all screws are tightened first. If it's making a noise like more like a rumbling after you've checked the screws and maybe it is the compressor or it sounds like maybe a engine I would seek professional help and get a pro out to diagnose further. Click the link below:
Your questions, answered
My HVAC is to loud?
First, you wanna check and make sure that all your screws are tightened from the outside as well as the condensing unit and the furnace or air handler. Second, you want to make sure the filters are tight and are they fit in the space the return . Third you wanna make sure the unit is the correct size for your home you can look at the data plate on the outside unit and get the model and serial number and depending on the manufacturer the name of the manufacturer you can put into Google and say look up the manufacturer fill in the blank. And it will come up and show you the size of the unit and then you can look up square footage of your home. If you don't have that you can get it off of Zillow and it will tell you the exact square footage of your home and you can do the calculations click the link below
I think my drain line is clogged?
If your drain line is clogged first of all, see where it runs out of the house at if it runs out of the house outside, and you have a shop vac you can unclog the drain line with the shop vac. If it is connected to a downstairs sink you may be able to pull the black hose or the additional hose under your sink apart. You'll need a few tools and suck it from that paper hose. Or if it is extremely clogged, you will need a plumber if it's clogged from the sink all the way down to the ground or the sewer. Need more help click the link below and get a Professional HVAC Technician out to your home?
Should I do this work myself or should I call a professional?
If you understand the scope of work that you're doing and you're confident and you have the right tools then yes it's OK to do the work but safety is always first and make sure that you're safe and everyone else is safe around you. With HVAC systems, most plumbing with a little research is doable. Some electrical is a little doable, but the refrigerant is totally unacceptable. You should seek a licensed professional to handle that part of the repair. Need additional help click the link below and schedule an appointment with a licensed professional HVAC.
How much should a new HVAC system cost?
How Much Should a New HVAC System Cost?
The cost of a new HVAC system can vary significantly depending on the size of your home, the efficiency of the equipment, the type of system, installation requirements, and your location.
💰 Typical HVAC Replacement Costs
For a standard residential heating and cooling system, homeowners can generally expect:
- Basic system: $6,000–$9,000
- Mid-range system: $9,000–$13,000
- High-efficiency system: $13,000–$18,000+
- Premium/variable-speed systems: $18,000–$25,000+
These are general ranges. Your actual price could be lower or higher depending on the equipment and installation.
What Determines the Price?
Several factors can affect the cost of your replacement:
1. System Size
A larger home usually requires a larger HVAC system, which can increase equipment and installation costs.
2. Efficiency Rating
Higher-efficiency systems typically cost more upfront but may reduce energy consumption over time.
3. Type of Equipment
A basic single-stage system will generally cost less than a two-stage or variable-speed system.
4. Installation Requirements
Electrical upgrades, ductwork repairs, refrigerant line modifications, drain-line work, equipment relocation, attic or crawl-space access, and other installation requirements can add to the cost.
5. Indoor Air Quality & Accessories
UV lights, air cleaners, upgraded filtration, surge protection, zoning systems, and other accessories can increase the total investment.
🚨 Don’t Automatically Choose the Cheapest Quote
A low HVAC quote isn’t always the best deal. Make sure you’re comparing the same size, efficiency, equipment quality, warranty, installation work, and included accessories.
Two companies can quote completely different prices because they are offering completely different systems or installation packages.
🔧 Repair or Replace?
If your system is older, requires frequent repairs, has a major component failure, or is becoming increasingly expensive to operate, replacement may make more financial sense than continuing to repair it.
Not sure whether you should repair or replace your HVAC system?
Use our Repair vs. Replace Calculator to help estimate which option may make the most sense for your situation.
Remember: A professional HVAC evaluation is the best way to determine the proper system size and replacement cost for your home. Click the link below:
What is a Capacitor
Capacitor Definition
A capacitor is an electrical component that stores and releases electrical energy to help an HVAC motor start and continue running properly.
Think of it like a small electrical battery that works very quickly. It charges and discharges electricity in fractions of a second to give the motor the electrical boost it needs.
How Does a Capacitor Work?
When your air conditioner turns on, the capacitor helps provide the extra electrical power needed to get the motor moving.
Depending on the HVAC system, capacitors can help operate:
- 🌀 Condenser fan motor — moves air across the outdoor coil.
- 🔧 Compressor — circulates refrigerant through the system.
- 💨 Blower motor — moves conditioned air through your home.
A common dual-run capacitor has three terminals:
C = Common
FAN = Condenser fan
HERM = Compressor
The capacitor essentially helps these motors receive the electrical assistance they need to start and operate.
🚨 What Happens When a Capacitor Goes Bad?
A failing capacitor can cause symptoms such as:
- Air conditioner won’t start
- Outdoor fan won’t spin
- Compressor struggles to start
- Humming or buzzing from the outdoor unit
- Motor overheating
- Higher electrical consumption
- System repeatedly shutting off
- Compressor potentially being damaged if the problem isn’t addressed
Important: A capacitor can still look normal and be bad. HVAC technicians use a meter to test its microfarad (µF) rating and determine whether it is within the manufacturer’s acceptable range.
🏠 Homeowner Tip
Don’t assume a capacitor is bad just because your AC isn’t running. Other electrical or mechanical problems can produce similar symptoms. Have a qualified HVAC technician properly diagnose the system. Need help changing out a capacitor talk to a pro or click the link below to set up a visit:
Cooling issues a few Q&A about Cooling?
Why is my AC not turning on?
Check the thermostat, batteries, disconnect, and circuit breaker first. If those are working and the system still won’t start, there may be an electrical or control problem that requires professional diagnosis.
Why is my AC running but not cooling?
Common causes include a dirty filter, dirty condenser coil, low refrigerant, restricted airflow, a failing compressor, or a problem with the blower. A temperature and system-performance test can help identify the cause.
Why is my AC blowing warm air?
Check that the thermostat is set to COOL and the indoor fan is operating. If the system is running but producing warm air, possible causes include low refrigerant, a dirty coil, compressor problems, or an outdoor unit that isn’t operating correctly.
Why does my HVAC system keep turning on and off?
This is called short cycling. A dirty filter, improper system size, thermostat problem, airflow restriction, overheating, or refrigerant issue can cause it.
Why is my AC running constantly?
Hot outdoor temperatures can make an AC run for long periods, but continuous operation may indicate low refrigerant, poor airflow, dirty coils, duct problems, inadequate insulation, or an aging system.
How long should my AC run?
There isn’t one exact answer. During very hot weather, longer cycles can be normal. The important factors are whether the system reaches the thermostat setting, maintains proper airflow, and operates without excessive cycling.
How long should an HVAC system last?
Many residential HVAC systems can last roughly 10–20 years, depending on equipment quality, installation, maintenance, climate, and usage.
How often should I have my HVAC system serviced?
A professional inspection is commonly recommended at least once a year, with some homeowners choosing separate heating and cooling inspections. For a pro to come out click the like below.
How It Works (Homeowners)
Air Flow Problems
Why is the airflow from my vents weak?
A dirty filter, blocked duct, closed damper, dirty blower wheel, dirty coil, failing blower motor, or excessive static pressure can reduce airflow.
Why is one room hotter than the others?
Possible causes include poor duct design, inadequate insulation, air leaks, closed or restricted vents, insufficient return air, or differences in sun exposure.
Why is my upstairs hotter than downstairs?
Heat naturally rises, and upstairs areas often have more heat gain. Poor insulation, duct problems, inadequate return air, or an improperly balanced system can make the problem worse.
Why is my blower motor not working?
The motor may have failed, or the problem could be the capacitor, control board, wiring, relay, or another electrical component.
Why is my blower motor making noise?
Grinding, squealing, rattling, or humming can indicate a worn motor bearing, loose component, debris, blower-wheel problem, or electrical issue.
How often should I change my air filter?
It depends on the filter and household conditions. Many filters need replacement around every 1–3 months, but homes with pets, dust, or higher occupancy may require more frequent changes.
What happens if my air filter is dirty?
A dirty filter restricts airflow, makes the system work harder, increases operating costs, and can contribute to coil freezing or blower problems.
Can a dirty filter cause my AC to freeze?
Yes. A severely restricted filter can reduce airflow across the evaporator coil enough to cause the coil to freeze.
Can blocked vents damage my HVAC system?
They can contribute to airflow problems and increase system stress. It’s generally best to keep supply and return vents open and unobstructed.
What causes high static pressure in an HVAC system?
Common causes include restrictive filters, undersized or damaged ductwork, dirty coils, blocked returns, closed vents, or an improperly designed duct system.
Need a Pro, click the link below?
How It Works (Homeowners)
Electrical and HVAC components
Why is my AC not turning on?
Check the thermostat, breaker, disconnect, and power supply. If those are functioning properly, the problem could involve a capacitor, contactor, control board, wiring, or another electrical component.
What does an AC capacitor do?
A capacitor stores and releases electrical energy to help HVAC motors start and operate properly. Many systems use separate or dual capacitors for the compressor and fan motor.
How do I know if my capacitor is bad?
A technician can test the capacitor’s capacitance and compare the measurement with the manufacturer’s rated value. Bulging, leaking, or damaged capacitors are also warning signs.
What does a contactor do?
The contactor is an electrically controlled switch that allows high-voltage power to reach components such as the compressor and condenser fan motor.
How do I know if my contactor is bad?
Burned contacts, severe pitting, buzzing, chattering, or failure to properly deliver power can indicate a contactor problem. Electrical testing should be performed by a qualified technician.
Why is my AC making a buzzing or humming noise?
It could be a contactor, capacitor, motor, compressor, transformer, or another electrical/mechanical component. The sound itself isn’t enough to determine the exact cause.
Why is my breaker tripping when my AC turns on?
Possible causes include an electrical short, overloaded circuit, failing capacitor, compressor problem, damaged wiring, or another electrical fault. Repeatedly resetting the breaker is not recommended.
Can a bad capacitor damage my compressor?
A failing capacitor can cause a motor to struggle to start or operate improperly and can contribute to overheating and increased electrical stress. It should be tested and replaced when outside its rated specifications.
What causes HVAC wires to burn?
Loose connections, excessive current, damaged insulation, undersized wiring, corrosion, or failing components can cause wires and terminals to overheat.
Why won’t my outdoor condenser fan turn on?
Possible causes include a failed capacitor, motor, contactor, wiring problem, control issue, or another electrical fault.
How do I know if my compressor is failing?
Warning signs can include abnormal amperage, overheating, unusual noises, repeated breaker trips, poor cooling, and abnormal pressure readings. A compressor should be properly tested before deciding it has failed.
Need more help? Click the link below.
How It Works (Homeowners)
Drains and Water Leaks
Why is water leaking from my AC?
Condensation is normal, but water in the wrong location can indicate a clogged condensate drain, frozen coil, damaged drain pan, improper drainage, or another problem.
Why is my emergency drain pan full of water?
The primary condensate drain may be clogged, the system may be producing excessive condensation, or there may be another drainage problem. A full emergency pan should be addressed before it overflows.
How do I know if my condensate drain is clogged?
Water backing up, overflowing from the drain pan, water around the indoor unit, or a float switch shutting the system off can indicate a clogged drain.
Can a clogged drain line damage my HVAC system?
Yes. A clogged drain can cause water damage and may activate safety switches that shut down the system. Prolonged moisture can also contribute to biological growth.
🧊 Refrigerant, Coils & Cooling Performance
How do I know if my AC is low on refrigerant?
Possible signs include poor cooling, long run times, ice on the coil or refrigerant lines, and abnormal pressure or temperature readings. Refrigerant charge should be verified using proper diagnostic measurements.
What does superheat mean?
Superheat is the temperature of refrigerant vapor above its boiling/saturation temperature. Technicians use it as part of the process of evaluating refrigerant flow and system operation.
What does subcooling mean?
Subcooling is the temperature difference between the refrigerant’s saturation temperature and the actual liquid-line temperature. It helps technicians evaluate refrigerant charge and system operation.
What is a normal Delta T for an AC system?
A typical residential cooling system may have roughly a 15–22°F temperature difference between return and supply air, although the proper range depends on system design and operating conditions.
Why is my evaporator coil freezing?
Common causes include restricted airflow, low refrigerant, blower problems, dirty coils, or metering-device problems.
Why is my outdoor refrigerant line freezing?
It can be caused by low airflow, low refrigerant, or other operating problems. The system should be diagnosed rather than simply adding refrigerant.
Can I add refrigerant myself?
Refrigerant handling requires specialized equipment and, in the U.S., EPA certification for technicians who service stationary refrigeration and air-conditioning equipment. It’s not a typical DIY repair.
Why does my AC keep losing refrigerant?
Refrigerant doesn’t normally get “used up.” If the charge repeatedly drops, there is likely a leak somewhere in the system.
Does low refrigerant mean I have a leak?
Usually, yes. A properly sealed system shouldn’t continually lose refrigerant.
How much does it cost to recharge an AC?
The cost varies significantly depending on refrigerant type, amount needed, accessibility, labor, and whether a leak must be repaired. A proper diagnosis should come before recharging. For more help we can get a Pro out ASAP click the link below.
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