Quick Checks You Can Do Before Scheduling an HVAC Repair

A dirty or clogged air filter is one of the most common causes of HVAC issues. Restricted airflow can make your system work harder, reduce efficiency, and even lead to system shutdowns.

If you notice weak airflow or your system isn’t cooling or heating effectively, start with the air filter:

• Remove the filter and hold it up to the light. If you can’t see through it, it’s time to replace it
• Replace filters every one to three months, depending on use and filter type.

• Check the batteries if there’s no power to the unit. Replace them with new batteries.
• Make sure the thermostat is set to “cool” or “heat,” depending on the season.
• Ensure the fan is set to “auto.”
• Confirm the temperature setting is below the current room temperature if it’s set to “cool” or above it if it’s set to “heat.”
• Replace the batteries if your thermostat is battery-operated.

If your system won’t power on, it might not be getting electricity. A tripped breaker or disconnected power switch can interrupt service without warning. Before calling for HVAC repair:

• Go to your electrical panel and find the HVAC circuit breaker. If it’s in the “off” position, flip it back on.
• Check the furnace or air handler for a power switch and flip it back on if needed. It may have been accidentally turned off.

Your outdoor condenser unit plays a major role in keeping your system running efficiently. Leaves, branches, and other debris can block airflow, reducing cooling performance.

Keeping the area clear can help prevent overheating and poor operation. You should:

• Remove leaves, branches, or other debris around the unit.
• Maintain at least 2 feet of clearance on all sides.
• Turn off the unit at the breaker and gently hose down the unit to remove dirt buildup.

Low refrigerant levels or a damaged AC refrigerant line can cause your system to struggle to cool your home.

While homeowners can’t refill refrigerant themselves, visual inspections can still reveal useful information before scheduling service:

• Look for frost or ice buildup on the refrigerant line.
• Check for visible damage to insulation or copper tubing.

To troubleshoot, you can:

• Locate the drain line exit. It’s usually a white PVC pipe near the outdoor unit. If there isn’t a steady drip or trickle of water when the AC is on, it’s likely clogged.
• Turn the AC off at the breaker. Insert a shop vacuum into the end of the drain line to temporarily relieve a clog and allow your HVAC system to work again.

You should then schedule professional HVAC maintenance to properly clear the drain.

Odd sounds are among the clearest signs that your HVAC system is having trouble. If you’re hearing anything new or strange, pay attention to when the noise happens and what it sounds like — this can help your HVAC technician pinpoint the issue faster:

• Rattling could mean loose parts or debris
• Hissing may indicate a refrigerant leak
• Grinding or squealing could point to motor problems

If you notice ice on your indoor or outdoor unit, it’s a sign of an airflow or refrigerant issue. Ice on HVAC systems can cause them to shut down or operate inefficiently.

• Let the unit thaw by turning the thermostat from “cool” to “off.”
• Accelerate the thawing process by changing the fan setting from “auto” to “on” to circulate more air.
• Check and replace the air filter if it’s dirty.
• Inspect refrigerant lines for damage.
• Wait for the unit to thaw and dry, and then turn the thermostat back to “cool” and the fan back to “auto.”