Intertherm ignition control module 626421
fits models MM(H,B)A and MM(H-B)B
1018 series automatic ignition system
other numbers found on the module. 1018-504, 626-421-B
RED Flash codes
1 Flash - the control is in lock-out because the inducer pressure switch is or was stuck closed
2 Flashes - the control is in lockout because the signal was not received by the control that the inducer pressure switch had closed within the time
3 Flashes - the control is in lockout because a failed ignition attempt, a gas valve error or a false flame sensed during the warm up period. If false flame has been sensed, the control will return to normal operation, and repeat ignition sequence when the false flame is not present
4 Flashes - the control is in lockout due to a failure within the control board

Intertherm Fan Switch 626468

Due to the inherit dangers associated with gas related appliances and replacement parts, we will no longer offer this item to the general public. If your service contractor is having difficulty locating the part you need, you may have them contact us at sales2@mhparts.com and we will gladly sell them the part you need. Please have your model number of your furnace when you call so that we can ensure you are purchasing the correct part for your furnace. Thank You

902661A replaces 902661

Intertherm Ignitor 903110A fits furnace model M1 with electronic ignition
Replaces 903110

Intertherm Limit Switch 626336 may also show 6263360
L160-40F

Replaces part # 626482

Intertherm Limit switch 626338 may also show 6263380
L105-40F