Coleman mobile home furnace pilot light turns off when blower turns on

SOURCE: pilot light wont stay lit once heater shuts off/ light goes off randomly

Hi Watertec00,

I am not familiar with this heater but it sounds like it could be a blockage in the main gas line into the heater or perhaps a blockage to the pilot gas line and maybe starving for gas. Best bet first is to check the main gas line from the heater. Easiest way to do this is to remove it from the heater and blow it through with compressed air. Then try the heater again. If that doesn't fix the problem then you can try blowing compressed air down through the pilot line. Could be a little dirt creating a blockage there. Then try the heater again. If it still does the same thing then try removing the panels to expose the heater's piping. If you can remove the main pipe into the heater from the gas and blow compressed air through it it should clear any obstruction from both the main line and the pilot. If this doesn't work then I would think you have a more severe problem and will need to take it to your local Heater Repairer. Hope this helps.

Regards
Bryan

SOURCE: cozy wall heater lights fine then goes out after 3 or 4 minutes

Make sure all the wire connections are good and tight. Next lift off the cover and look for a little thermal disc mounted up by top of the heat exchanger. Most have a re-set button but not all. If you have this ,by-pass it ,see if that solves the problem, if so it may be defective, or doing its job and you have a venting problem. If you don't have this and have changed the thermocouple (was it a copper tube with a fitting that screwed into the gas valve, or did it have 2 wires, that is a pilot generator, kind of same thing) make sure the probe is set correct, with the pilot flame heating the top 1/3rd of the probe. The only thing left is the gas valve.

SOURCE: Fix for coleman rv furnace

Check all limit switches and check power to gas control

SOURCE: cozy furnace

The pilot orifice could be dirty causing the pilot flame to be too small. Unscrew the pilot tube at the pilot assembly. The orifice is inside. Remove the orifice and blow it out with compressed air only. Reassemble and see if that fixes the problem. If the pilot flame is set too low, sometimes opening a door will cause a draft to blow out the pilot. If the thermocouple is good and the pilot flame is set properly, the control valve may be bad.

SOURCE: Coleman Gravity Floor Furnace need millivolt gas valve & pilot ki

Go to www.grainger.com and look for a "power pile generator" this is a millivolt thermocouple that may be just what you need to make your heater work again