I have a Coleman furnace model# 7970 856 in my mobile home....the furnace runs for a few minutes then kicks out....starts up a minute or two later....luke warm air coming out of vents

Chandler Ede

• 1420 Answers

SOURCE: Coleman forced air furnace blower

Rmove the two screws holding the blower in place and slide it out. With the power off, rotate the wheel and inspect for debris or an impingement. If everything turns easy, you have a bad motor or start capacitor. If you have rubbing, adjust the wheel. If the motor will not turn, replace it.

Posted on May 30, 2008

Allen Neal

• 359 Answers

SOURCE: Rollout Limit Switch Keeps Tripping

have someone check the gas presure most likely too high no more than 11

Posted on Dec 17, 2008

Chandler Ede

• 1420 Answers

SOURCE: i have a coleman in my modular home, dosent blow hot air, everyth

Check the air filter and clean. If you can, raise the blower speed up to the next speed. Make sure all of the supply and return grills are open. Is the ductwork connected under the home and well insulated? Does the furnace ever stop or keep on running? If it does stop, you may have a bad thermostat.

Posted on Jan 03, 2010

Paul

• 144 Answers

SOURCE: install automatic ignition system for a coleman furnace

For sure turn off the power at the breaker!! Now as far as the new board, usually the new board will be a new modified replacement, the wiring will be different from the original. It is very important to follow the installation instruction that come with the new board, if you go step by step, it will be ok. Just don't be surprised when you find that the new one is not exact. It is all in the name of improvement, follow the install manuals, step by step. As a 30 year Heating and cooling tech, it was very worrisome when they started doing this, but as long as you have a board that matches the brand and model of your furnace, it will be ok.
Good Luck,
Paul Gibson

Posted on Mar 31, 2010

Dan Webster

• 8220 Answers

SOURCE: I have a coleman evcon

If the thermostat is ok which it probably is then your sequencer is most likely stuck i would say. You could verify that by removing 24 volts to the sequencer to see if it will shut down the heater
When low voltage from the thermostat is applied at the base of this sequencer it heats a bi-metal and turns on each coil and fan in a sequence that will insure the breaker don't throw from the power surge AND warm air comes out the vents when that fan comes on. I would start there.

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Posted on Dec 28, 2010