Common Electric Furnace Problems and Solutions
No heat
| Possible Cause | Procedure |
|---|---|
| Circuit breaker tripped or fuse blown | Replace fuse or reset breaker |
| Wires broken or terminal connectors loose or faulty | Inspect furnace wiring and install new connectors if necessary Tighten wire connections |
| Wires burned (look for burned paint on furnace housing) | Inspect wiring and replace wires if necessary If problem persists, have electrician check for aluminum wiring and replace it |
| Control or heating circuit breaker or fuse faulty | Replace fuse or reset breaker |
| Transformer faulty | Test transformer and replace it if necessary |
| Limit controls faulty | Identify faulty element circuit, test limit control, and replace it if necessary |
| Heating elements burned out due to dirty air filter | Replace air filter, identify faulty element circuits, test heating elements, and replace if necessary |
| Heating elements faulty | Identify faulty element circuits, test heating elements, and replace if necessary |
| Heat relay faulty | Call for service |
| Sequencer relay faulty | Call for service |
Intermittent or insufficient heat
| Possible Cause | Procedure |
|---|---|
| Wire connections loose | Inspect furnace wiring, tighten connections, or replace loose wire connectors |
| Wires burned (look for burned paint on furnace housing) | Inspect wiring and replace wires if necessary If problem persists, have electrician check for aluminum wiring and replace it |
| Thermostat anticipator not adjusted for electric furnace | Adjust thermostat anticipator |
| Old-style thermostat does not have anticipator | Have thermostat replaced |
| Limit control faulty | Identify faulty element circuit, test limit control, and replace it if necessary |
| Heating elements faulty | Identify faulty element circuits, test heating elements, and replace if necessary |
| Sequencer relay faulty | Call for service |
