ICP OEM Parts

AC Compressor Won't Start — Hums or Clicks

ICP family units (ICP, Heil, Tempstar, Comfortmaker) share the same condenser platform. The run capacitor is the #1 failure — typically a 45/5 or 40/5 MFD 440V dual run cap. When it fails, the compressor hums but won't engage, or the condenser fan runs at partial speed. Check for a bulging or oil-leaking capacitor. This is a $18 DIY fix that takes 15 minutes. Shop ICP capacitors →

If the capacitor tests good, check the contactor. ICP units use a 30A or 40A single-pole contactor. Pitted or burned contacts prevent the compressor from receiving power. Listen for a click when the thermostat calls — no click means a dead contactor coil. Shop ICP contactors →

Furnace Short-Cycles — Lights Then Dies

The flame sensor is the most common cause of short-cycling on ICP family furnaces. These units use the same control boards and flame sensors across all ICP brands — a sensor from a Heil furnace fits an identical Tempstar or Comfortmaker model. Clean the sensor rod with fine sandpaper (emery cloth). If cleaning doesn't last more than a few days, replace the sensor — it's under $20. Shop ICP flame sensors →

Pressure Switch Error (2 Blinks)

ICP furnaces frequently throw pressure switch errors, especially in cold weather. Before replacing the switch, check: 1) the condensate drain trap — if it's full, it blocks inducer airflow. 2) the vent pipe — ice or bird nests block exhaust. 3) the inducer motor — listen for unusual sounds. Only replace the pressure switch after confirming the inducer and venting are clear.

ICP Parts Cross-Compatibility

All ICP family brands — Heil, Tempstar, Comfortmaker, Arcoaire, Keeprite, Day & Night — use identical OEM parts. A control board from a Heil furnace is the same board in the equivalent Tempstar, Comfortmaker, or ICP model. Same part numbers, same factory. Search by your model number above for guaranteed cross-brand fit.