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Frequently Asked Questions

Find expert solutions to common HVAC issues, from AC repairs to improving efficiency and troubleshooting problems.

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FAQ #1

Why is my AC running but not cooling my house?

If your AC runs but doesn’t cool, it may have a dirty filter, low refrigerant, or a frozen coil. Check your thermostat settings and airflow. If the issue persists, a professional inspection is needed to diagnose leaks, compressor issues, or other malfunctions.

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FAQ #2

How much does AC repair cost on average?

AC repair costs vary from $100–$500 for minor issues like capacitor replacement, while major repairs like compressor failure can exceed $1,500. Emergency services and refrigerant refills may cost more. An HVAC technician can provide an accurate estimate.

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FAQ #3

Why is my air conditioner making a loud noise?

Unusual AC noises can mean loose parts, refrigerant leaks, or motor failure. Banging suggests a broken component, hissing indicates a leak, and grinding may mean worn bearings. Turn off the unit and call a professional to prevent damage.

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FAQ #4

What should I do if my AC is leaking water?

Water leaks can be caused by a clogged condensate drain, frozen coils, or a damaged drain pan. Turn off your AC, check the drain line, and replace the filter. If leaking continues, a technician may need to clear the line or repair the system.

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FAQ #5

How often should I replace my HVAC air filter?

Replace your AC filter every 1–3 months, depending on usage, pet dander, and air quality. A dirty filter reduces efficiency, increases energy bills, and can cause airflow issues, making your system work harder.

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FAQ #6

What are the signs that my AC compressor is failing?

Signs of compressor failure include weak airflow, warm air from vents, loud noises, and frequent circuit breaker trips. If your AC struggles to cool properly, it may need a compressor repair or replacement.

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FAQ #7

Why does my AC keep turning on and off frequently?

Frequent cycling, or short cycling, is often caused by dirty filters, low refrigerant, or a thermostat issue. An oversized unit may also cycle too frequently. If troubleshooting doesn’t help, call an HVAC expert to diagnose the problem.

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FAQ #8

Can I troubleshoot my AC before calling a technician?

Yes! Check your thermostat settings, change the air filter, and inspect for tripped breakers. Clear debris from the outdoor unit. If your AC still isn’t working, a professional inspection is recommended.

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FAQ #9

How long does an HVAC repair typically take?

Most AC repairs take 1–3 hours, depending on the issue. Minor fixes like capacitor or relay replacements are quick, while major repairs, like compressor replacement, can take several hours or more.

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FAQ #10

Why does my air conditioner smell bad when it runs?

Bad AC smells can be caused by mold in the ducts, a clogged drain line, or burned electrical components. Musty odors suggest mold, while burning smells could indicate wiring issues. Have a professional inspect your system.

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FAQ #11

What causes weak airflow from my AC vents?

Weak airflow can be caused by a dirty filter, blocked vents, or duct leaks. A failing blower motor or frozen coils can also reduce airflow. Regular maintenance and cleaning can help prevent this issue.

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FAQ #12

Is it better to repair or replace an old air conditioner?

If your AC is over 10 years old and requires frequent or costly repairs, replacement may be more cost-effective. New systems offer better efficiency and lower energy costs. An HVAC professional can assess your options.

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FAQ #13

Why does my AC freeze up even in hot weather?

Frozen AC coils are usually caused by restricted airflow, low refrigerant, or a dirty filter. Turn off your system to let it thaw, replace the filter, and check airflow. If freezing continues, a refrigerant leak or mechanical issue may be the cause.

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FAQ #14

How do I reset my air conditioning unit?

Turn off your AC at the thermostat and breaker, wait 5–10 minutes, then turn it back on. If the issue persists, check for tripped breakers, clogged filters, or thermostat malfunctions before calling a technician.

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FAQ #15

What should I check if my heater is blowing cold air?

A heater blowing cold air may have a thermostat issue, dirty air filter, or pilot light problem. Check thermostat settings, reset the furnace, and ensure gas supply is on. If the problem persists, an HVAC professional should inspect it.

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