Make: All
Model or Series: All
Type: Add-On Heat Pump & 90% Gas Furnace
Problem Description: Heat pump kicking-out on high pressure in heating mode.
Observed Symptoms:
- Suction pressures a little low, head pressure normal in cooling
- Head pressure climbs above 500 in heating
- Liquid line a little hot in heating mode
- Gas furnace kicks-off on limit
- Moderate to low airflow from registers
- Filters clean
- Indoor coil clean
- Fan speed on High
- Static pressures low
Solution: Dirty recoup coil
Additional Information:
- The evaporator coil had been brushed & chemically-cleaned previously.
- A dirty evaporator coil with a 90% gas furnace should always alert to a dirty recoup coil.
- Airflow must go through the recoup coil before getting to the evaporator.