Brand:SEARS
Model Number: 417.94042500
Main Symptom: Runs but no heat
What happens & when:
Error Code (if any): n/a
Parts or tests already tried: AP2150379 Gas Valve Coil Kit
Photos / video link:
When the dryer is operating, does the igniter glow at all?
The Igniter does not glow at all.
With the power supply cord unplugged, the timer can be tested from terminal H to terminal A for continuity when it is set to a heated dry cycle. If it has continuity, the thermostats would need to be tested for continuity. Have any of the thermostats or the timer failed a continuity test? These links can be used to view the part information pages for them.
Timer- 131960800 Dryer Timer | Genuine Frigidaire OEM In Stock
Cycling thermostat (located on the blower housing)- 134048900 Control Thermostat (Dryer) | Genuine Frigidaire OEM In Stock
Safety thermostat (located on the rear bulkhead)- https://www.appliancepartspros.com/frigidaire-sfty-thermostat-5308015399-ap2152884.html
Timer, and both thermostats have continuity.
The next step would be identifying if the flame sensor has continuity and if there is a damaged wire.
I have continuity through the Heat Sensor, and I don’t see any bad wires. Is there a seperate Flame Sensor? I don’t see it in the parts list or machine.
The flame sensor and the heat sensor are the same part. Based on everything that has been tested and checked, the motor would be the cause of failure. Unfortunately, it appears that the manufacturer has discontinued the motor as seen in this link. 131560100 Motor | Genuine Frigidaire OEM In Stock
But the motor runs, drum turns. How does that affect ignition?
The motor controls the neutral side of the heating circuit through contacts activated by the centrifugal switch in the motor. If the centrifugal switch does not move enough to engage the contacts, or the contacts are failing to connect, the motor will prevent heating from occurring.
That makes sense. Thanks.
I tried vacuuming off the motor as best I could since the motor has no housings. With the gas off, I get 122.5V to the igniter when the machine is running, but the igniter does not glow. Does that change anything?
Are you testing from wire to wire or from wire to frame?
I uncoupled the Igniter’s connector and tested to the two terminals on the live side of the connector. No voltage until the motor started.
That does change things then. If the igniter is able to get voltage to it, and it does not do what it should, then the igniter would need to be replaced. It looks like the igniter for this model comes with a mounting bracket and may have changed from what the original was on yours. 5304517325 Ignitor | Genuine Frigidaire OEM In Stock
OK. I will replace the Igniter and update the thread. Thanks for all your help
Igniter came today. Installed and dryer now works fine. Thanks!