5 Year Old HVAC Unit in Need of a Heat Pump Repair in Boones Creek, TN

We received a call from a customer in Boones Creek, Tennessee in need of a heat pump repair on his 5-year-old system. The heat pump was not keeping up with his indoor set temperature and it was 93 degrees outside. He stated that his entire unit was randomly shutting off and then would come back on and start cooling again.

When we arrived, we hooked up probes to the outdoor unit and began to monitor the system. While monitoring the system the outdoor unit randomly shut off. We tested high voltage to the outdoor unit and we still had it. We tested low voltage to the outdoor unit and we lost 24-volts to the outdoor unit between C & R. We went into the garage and looked at the indoor unit. There were 2 float switches on the indoor unit. The emergency pan was dry so the float switch inside the emergency pan was not tripped. We opened the auxiliary drain float switch and it had water inside of it.

We opened the indoor unit up and confirmed that the auxiliary drain float switch had tripped which shut down the 24-volts to the entire system. We noticed debris at the exit of the indoor drain pan. We were able to remove that clog by hand. The drain line ran over to a sump pump pit. The drain line near the sump pit was not glued. We pulled the drain line apart and removed a massive zoogleal clog at the 90-elbow turning towards the sump pump. We put our shop vac on the drain line and removed more debris from the drain line. We put the drain line back together and poured 1 gallon of foaming drain cleaner down the drain line. Then, we ran 2 gallons of clean water down the drain as well.

We put the indoor unit back together and restored the cooling call. We monitored the system while running in cool mode with probes hooked to the system and verified that the refrigerant charge was correct, the temperature split was within range for the conditions present, superheat was on target, and the unit was no longer randomly shutting down.

If you are in need of a heat pump repair and live within our service area of Northeast Tennessee, please feel free to reach out to us. Stay safe and best wishes.

Location: Boones Creek, TN