Lochinvar Electrical Short or Overload

Heater runs but then trips the house breaker or blows fuses intermittently.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Shorted blower motor, Shorted igniter, Damaged wiring harness, Incorrect breaker size

Safety: If the breaker trips repeatedly, leave it OFF until the fault is found. Do not replace a breaker with a larger size.

Steps:

Visual inspection: With power off, inspect all visible wiring for melted insulation, burn marks, or pinched cables.
Check components: Look for signs of overheating on the blower motor, igniter leads, and control board.

Further diagnosis requires a technician to isolate circuits and test components with a meter.

Professional Required 5/5

Wiring Harness / Blower Motor / Igniter

Check Price on Amazon

We may earn a commission from links on this page.