Frigidaire · Range / Oven error code

F25 / F27UI to relay board communication failure

Single source High-voltage / caution

Unlock what this code means, its causes, tests and parts

Full library + AI assistant for $34.90, one time.

OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work.

Related diagnostic guides

Guide · Range / Oven

Oven keeps heating when turned off or overheats past setpoint

This is a fire hazard: turn the breaker off first, then diagnose. On electronic controls the usual cause is a relay on the control board whose contacts have welded closed. On dial ovens it is a stuck thermostat or selector contact. Less often a shorted sensor or harness is to blame. On gas ovens, a burner that won't shut off is a gas-valve problem and goes to a licensed gas technician.

7 steps ~60 minadvanced

Guide · Range / Oven

Oven cooling fan keeps running after the oven is off (or never runs)

Electric and many gas ranges and wall ovens have a cooling fan that protects the controls, door and cabinetry; it keeps running after the oven is off until the controls area cools, and cannot be switched off. Running for a while after a long or hot bake is normal; running with the oven cold, starting at power-up or never stopping points to a fan thermostat stuck closed, a welded relay, a bad temperature sensor reading or a control fault. A fan that never runs is a safety issue because the controls overheat.

8 steps ~60 minmoderate

Guide · Range / Oven

Electric oven not heating (bake or broil)

Most no-heat calls on electric ovens come down to a burned-out bake or broil element, a failed oven temperature sensor, or loss of one 120 V leg of the 240 V supply. Test elements and sensor with power off before suspecting the control board.

7 steps ~45 minmoderate