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Heating, Air Conditioning, Fridge, HVAC/it's 35 degrees and I have no heat


I have a janitrol gpd100-4 gas furnace that's acting up...
When it goes to turn on everything is normal the blower starts and the glow plug heats..
then when the gas is supposed to come on several things might happen.
1. the glow plug will stay on for minute the shuts off or
2. the gas will ignite normally but only for a quick puff or as long as a few seconds then shuts off or
3. the gas will ignite and stay on for a few minutes then shuts off or
4. the gas will turn on and it will cycle on and off like it should but it will still shut down after an hour or two (this only happened once) I thought I fixed it at this time..
The control board error lite either will stay on solid all the time while its plugged into the wall or it will blink once very slowly.
I replaced the ignitor coil last spring, and I just cleaned the sensors both the single wire solid metal tube by on the left hand side of unit ( I think this the flame sensor ) and the 2 wire dime sized flat unit in the middle of the unit. I think this is the temperature limiter sensor switch ( I used fine steel wool to clean them.....)

Thank you for your request.  Unfortunately our expertise is with Major Home Appliances only.  This site puts Home Refrigeration and HVAC in the same catagory.  This would include washers, dryers, refrigerators, microwaves, dishwasher, ranges and ovens.  If you need help with any of these appliances, feel free to submit another request.  For your problem, please request assistance from a AllExpert with experience in the HVAC service field.  If you ever need assistance with Major Home Appliances feel free to come back and initiate another request.  Visit our Website at or email us directly at

Thank You for your request,
Eric & Ann Campion

Heating, Air Conditioning, Fridge, HVAC

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Eric Campion


We have been repairing appliances for over 36 years and have owned our own business for the same. We can help in any or almost all complaints or at least give you some intelligent input to help you make rational decisions. If maxed-out... You may visit our website at for quicker service.


30 years owning our business and repairing Major Home Appliances

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36 Years of Working on Major Home Appliances and selling parts. Our office staff is top notched and is supervised by My Wife Ann who is also very experienced in the Major Home Appliance Service and Part Sales Business

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