Don’t Suffer Through Summer: What to Do if Your AC Stopped Working

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It’s not just you… the summers are getting hotter.

We’re seeing record heatwaves creating higher-than-normal temperatures. You’re in for an uncomfortable time if your AC stopped working. Luckily, this post shares what to do when the air conditioner goes kaput.

ac stopped working

1. Check the Power and Thermostat

HVAC will click off for many reasons but don’t overlook something as simple as a tripped breaker.

  1. Go to your electric panel and find your HVAC’s breaker
  2. Click the break into the ‘off’ position then back to ‘on’
  3. Check if the AC unit turns back on by listening or feeling airflow

This may solve the problem outright. Or, reveal electrical problems like wiring issues. Use a multimeter to test wiring else call on a professional.

The problem may stem from a malfunctioning thermostat, too. You or a family member may have set a new temperature. You didn’t realize the change and blanked on something simple like the settings.

  1. Check the thermostat is set to ‘on’ and ‘cool’
  2. Listen for AC noise or feel for cool air

Checking the power switch next to the unit, too. Someone may have turned it off by mistake. Switch it to ‘on’ and repeat the prior steps.

2. Check the Air Filter, Coil, and Ductwork

You should get into the habit of replacing your AC unit’s air filter monthly. A build-up can cause the air quality to diminish. And, cause the unit to freeze because it’s not receiving proper airflow.

Other tips:

  • Keep the AC at a reasonable temperature prevent it working too hard
  • Check the refrigerant as this may cause the coil to freeze from moisture

Your ductwork may also be the problematic source:

  • Open registers to create airflow throughout the house
  • Clean registers and accessible ductwork
  • Patch leaks and openings with metal duct tape and sealant

Damage to the blower fan may have happened, too. This item circulates the air through the HVAC disrupting its airflow. Replace the blower fan if necessary.

3. Check the Float Switch

Cranking the unit below its usual settings may trip the float switch. This causes a leak causing the unit to pool and shut down to prevent damage. The switch may become blocked from mildew and mold if condensation is frequent, too.

  1. Access your HVAC unit
  2. Check the ‘sensor’ (usually looks like a ball)
  3. Wiggle it lose or replace the switch

Note: Don’t attempt this repair if you’re not 100% sure it’s the issue. This may bypass the safety features causing extra damage to the unit.

4. Check the Condenser

Buzzing and humming are signs the condenser is malfunctioning. There are several parts to the condenser creating several items to review — like:

  • Cleaning the exterior and interior of the AC unit
  • Sealing or replacing leaky tubing
  • Replacing the capacitor, relay switch, or control board

A bad motor is a tell-tale sign of an ac not working. The motor blows air throughout the HVAC system and one of the highest priced items to fix. This is a good time to check and swap the condenser coil, too.

When to Contact Pros if the AC Stopped Working

The heat can make living unbearable if the AC stopped working. Overspending in trying to fix it without knowing the real issues happen. It’s time for the pros if you were unsuccessful with DIY air conditioning repair.

Give us a call, 302-836-1921, or contact us asap. We’ll be at your home, fixing your HVAC, and getting you cool in no time!