Top Things to Check Before You Call an Air Conditioning or Heating Repair Company

When your air conditioner or heater stops working, it’s easy to assume the worst and call for service right away. But in many cases, the problem is caused by a simple issue you can check in just a few minutes.

Before you call an air conditioning or heating repair company, use this checklist to rule out common problems. You might save time, money, and avoid an unnecessary service call.

1) Check Your Thermostat Settings

Thermostat settings are one of the most common reasons homeowners think their HVAC system is broken.

• Make sure it’s set to Cool or Heat (not Off)
• Confirm the temperature is set lower (AC) or higher (heat) than the room temperature
• Set the fan to Auto instead of On
• Replace batteries if your thermostat uses them

2) Inspect and Replace the Air Filter

A dirty air filter can restrict airflow so much that your system stops heating or cooling properly—and in some cases, it can cause the system to shut down.

• Weak airflow from vents
• System running longer than normal
• Hot or cold spots in the home
• Frozen AC lines or frequent shut-offs

Most homes should replace filters every 1–3 months, depending on pets, dust, and usage.

3) Check the Circuit Breaker

HVAC systems draw a lot of power. If your unit won’t turn on at all, a tripped breaker could be the cause.

• Check breakers labeled AC, Furnace, or HVAC
• Reset the breaker once if it’s tripped

If the breaker trips again, stop and call a professional—this usually indicates a deeper electrical issue.

4) Make Sure the System Power Switch Is On

Many furnaces and air handlers have a nearby power switch that looks like a light switch. These can be accidentally turned off.

• Check the switch near the furnace or air handler
• For AC systems, confirm the outdoor disconnect hasn’t been shut off

5) Inspect the Outdoor AC Unit

If your air conditioner isn’t cooling, take a quick look at the outdoor condenser unit.

• Clear away leaves and debris (keep 2 feet of clearance)
• Confirm the unit runs when cooling is turned on
• Listen for buzzing, grinding, or clicking sounds

6) Check Supply Vents and Airflow

Blocked vents can cause uneven temperatures and extra strain on your HVAC system.

• Make sure vents are open in each room
• Move furniture or rugs away from registers
• Ensure return vents are not blocked

7) Warning Signs That Require Professional Repair

Some HVAC issues should not be ignored. Call a professional if you notice:

• Burning, electrical, or gas-like odors
• Loud banging, grinding, or screeching noises
• Short cycling or constant restarting
• Ice buildup on AC lines
• No heating or cooling during extreme weather

When It’s Time to Call an HVAC Repair Company

If you’ve checked these items and your system still isn’t working, it’s time to call a licensed air conditioning or heating repair company. Professional diagnosis ensures safe, accurate repairs.

Issues such as refrigerant leaks, capacitor failures, blower motor problems, and electrical faults require trained HVAC technicians.

Final Thoughts

Basic checks like thermostat settings, air filters, and breakers can resolve many HVAC issues. When problems persist, calling a trusted local heating and air conditioning repair company is the best way to restore comfort safely and efficiently. Contact Infinity Air Services for a Free Quote