Hello, my oven is a Kenmore 790.70502013 (single oven burner, single ignitor, single gas control valve)
The oven burner intermittently ignites and it will not stay lit long enough to come anywhere close to usable temperature.
Symptoms: Turn oven on to bake/broil. The glow ignitor will glow, the burner will usually ignite in 60-120 seconds, however, the ignitor will stop glowing shortly after burner turns on (within 5 sec to 2 min), when the ignitor stops glowing, the gas supply turns off, and the burner goes out. The oven does not seem to try to relite after this happens, at least not in any reasonable amount of time. Unplugging the oven for several minutes then trying bake or broil again will result in the same thing happening again.
I have taken it apart and tried all the tests I could find online which include:
· All gas supply valves are fully open. Stovetop burners work perfectly fine, indicating the main gas supply is not the issue.
· Glow Ignitor Tests: The removed, isolated ignitor showed to have continuity. The resistance of the ignitor was measured to be 336 ohms. I do not have an amp meter to measure the amp draw of the ignitor.
· Gas Control Valve Tests: The terminals on the gas control valve have continuity. The resistance between the gas control valve terminals (with ignitor removed) was measured to be 2.5 ohms.
· Voltage Supply: The voltage supplied to the gas control valve and ignitor was measured to be ~118 VAC when in bake/broil mode.
· Temperature Sensor: The disconnected temperature sensor was measured to have 1069 ohms of resistance at room temperature, suggesting that it is functioning properly.
· Relay Noise: When the oven is set to bake/broil you can hear a relay switch. The ignitor is supplied with AC voltage and begins to heat. Then the gas control valve opens, and the burner ignites. Shortly after you can hear the relay switch, the ignitor stops glowing, and the gas turns off.
I am thinking that it may be a failing ignitor? From what I have found 336 ohm resistance on the ignitor is higher than it usual?
Can a failing ignitor cause the oven to ignite, run for a short amount of time, then turn off? Do you think it could be the oven control board instead of the ignitor?
Any advice would be greatly appreciated as I am planning on ordering a new ignitor but it is a $80 part for the OEM version. Thanks!