Furnace Repair
No heat, cold air, short cycling, ignition faults, blower failure, and strange furnace noises in Everett homes — diagnosed and repaired by Everett Air HVAC.
Read MoreThe short answer
Light frost on a heat pump outdoor unit that clears in a defrost cycle is normal. Thick, solid ice that never clears, a fan that stops, or auxiliary heat running in mild weather is a fault. Heat-pump supply air also feels cooler than furnace air, so cool-feeling air alone does not mean failure. Clear snow and debris, keep the system on Heat rather than emergency heat, and call if ice persists or auxiliary heat runs when it should not.
Heat-pump questions in winter almost always start the same way: ice on the outdoor unit, air that feels cool, and a bill that jumps. The first two are often normal behaviour misunderstood, and the third is often the real fault — auxiliary resistance strips doing the work because the heat pump cannot meet the load or has locked out. Telling normal defrost from a failed defrost is the key check, and it needs no tools.
What you notice
- Light white frost on the outdoor coil that clears, with steam and a whooshing sound as the fan pauses for a few minutes.
- Thick solid ice that does not clear, ice stopping the fan, or ice building cycle after cycle.
- Supply air that feels cool, and a house falling behind setpoint in very cold weather.
- An AUX or EM HEAT indicator lit for long stretches, including in mild weather, with very long runtimes and a bill spike.
