How Often Should Defrost Mode Run?Updated 2 months ago

There is no fixed schedule for defrost cycles. Frequency depends on outdoor temperature, humidity, system design, and installation conditions. In cold, damp weather, it is normal for a heat pump to enter defrost mode periodically, sometimes once every hour.

Short, controlled defrost cycles are far better than allowing frost to build up and reduce heating performance.

Many homeowners turn off their heat pump when heating pauses or cool air appears. This is a common mistake. Interrupting the defrost process can prevent complete frost removal and may lead to more frequent icing.

In most cases, the best approach is to leave the system running and allow it to complete the cycle automatically.