Heat Pump / Air Conditioner Re: Compressor Not Running The contactor is pulled-in but the compressor is not operating. No Compressor Amperage Equal Suction & Discharge Pressure Qty Possible Causes: 1 Bad Capacitor Internal Overload Open Locked-Up...

Replaced the Contactor - Now Compressor Won't Start Issue: The compressor was operating before replacing the contactor, but now it just hums and won't come on. Cause: This is generally the result of mis-wiring the high voltage going to the compressor. Proper Wiring: One leg of the...

COOLING COIL FREEZE-UP: The indoor coil develops either a coating of thick, white frost or thick ice. May only freeze a portion of the indoor coil or the entire coil. Ice may extend from the indoor coil all the way to the compressor in the outdoor unit. Generally causes a loss of airflow from...

Cooling Re: Low Suction Pressure A heat pump or air conditioner runs with a lower-than-normal suction pressure. NORMAL SUCTION PRESSURE: R-22 = 55 - 80 psig R410a = 100 - 150 psig Qty Possible Causes: Low Refrigerant Charge Bad Expansion Valve ...

SERVICE VALVES LEAKING It is common for old service valves to leak refrigerant around the seals - especially after closing and re-opening the valves. WHAT TO DO: The cap for the service valves should be able to tighten-down enough to keep the refrigerant sealed. Add either "leak-lock" or...

Make: Any Model or Series: Any Type: Any Problem Description: Compressor & Outdoor Fan Cycling Observed Symptoms: Compressor & outdoor fan come on for several seconds then go back off. Solution: Found unit kicking-off on High Pressure due to overcharge. Recovered excess...

New Heat Pumps Re: Expansion Valve Issue Many new heat pumps manufactured 2014 - 2015 have experienced sluggish or sticking expansion valves. The Issue has been traced back to an additive that Copeland was putting in their scroll compressors. This additive has caused expansion valves (indoor...

Honeywell Thermostat: TH8320R & TH8321R VisionPro Re: THERMOSTAT OVER-COOLS With a Honeywell VisionPro or Prestige thermostat, the most common reason for the thermostat to overcool is Dehumidification. When either thermostat is configured to dehumidify, there is a setup option for "OVER...

Air Conditioner Re: Blown Fuse / Low Voltage Short Indications: A Blown Low Voltage Fuse or a Bad Transformer on the Furnace or Air Handler Qty Possible Causes: Shorted Control Wire To Stat 1 Shorted Control Wire To A/C Bad Contactor Shorted...

Cooling Re: Condensate Leakage The air conditioning condensate is leaking from the a/c coil instead of running out the drain. Qty Possible Causes: 1 Clogged Drain Pipe Frozen Coil Hole in Drain Pan Condensate Missing Drain Pan No Drain Trap...