Display shows H1 and unit does not blow warm air immediately in heating mode.

Note: H1 on many Westinghouse heat pump models is a status indication, not a fault. It indicates the unit is in preheating or defrost mode.

Steps:

• Wait 5–10 minutes: Allow the unit time to complete preheating or defrost. Warm air should resume automatically.
• Check filters and coils: Dirty indoor or outdoor coils can prolong defrost cycles. Clean filters and coils as needed.
• Observe frequency: If H1 appears constantly and heating is poor, there may be an underlying sensor or refrigerant issue requiring professional diagnosis.

When to call a technician: If H1 never clears or heating performance is inadequate, have a technician check sensors, refrigerant charge, and defrost control.