Question about Coleman Propane Forced Air Heater w/Electronic Ignition (50,000-80,000 BTU)

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Combustion air switch failed to close - Coleman Propane Forced Air Heater w/Electronic Ignition (50,000-80,000 BTU)

Posted by rlynn2170 on

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5 Related Answers

Anonymous

  • 6 Answers

SOURCE: heater flashes 3 times says

Combustion switch is your vent safety.. Check your vents outside for blockage, sometimes the intake pipe will freeze or frost up not allowing the preassure switch(vent safety)to close. putting furnace into a lock out.. you can reset the furnace by turning the power on and off.. if there is no power switch just remove the bottom door and reinstall...

Posted on Jan 15, 2009

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Anonymous

  • 674 Answers

SOURCE: the light indicator says that

The combustion air switch is closed by the air pressure from the draft inducer fan. You can check it with a voltmeter. When the heater starts to run check the voltage reading where two wires connect to the switch. It should be 0 vac if the switch is closed. Instead of starting the furnace, you could also remove one end of the rubber hose that goes to it from the draft motor and blow into the hose and see if that closes the switch. It may be just stuck. I almost forgot to mention the most important thing; make sure the draft motor is running. Let me know what you find. The air pressure switch is a safety feature to prevent the furnace from running if there isn't enough air supplied to the burner for proper combustion.

Posted on Sep 16, 2010

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TheMobilian

Dan Webster

  • 8220 Answers

SOURCE: combustion air switch failed to

The combustion fan commonly known in the HVAC world as the Draft Inducer has a tube between the fan and the proving switch. The SUCTION from the fan is what causes the switch to trip and verify to the main board the inducer is up and going. Take that rubber hose off and check for obstructions between the two components. This video show basic furnace operation:


If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

Posted on Nov 02, 2010

Anonymous

  • 77 Answers

SOURCE: coleman combustion air switch failed

If the vacuum switch did not pull in first look to make sure there are no restrictions in the vent pipe if the vent pipe is real long try disconnecting it from the furnace then try to run the furnace again. If that's not it take the rubber hose loose from the combustion blower and **** on it see if the switch itself is bad. If the vent is cleaned out and the vacuum switch sucks in with little effort then your combustion blower in not pulling the proper CFM (cubic feet per minute) and needs to be replaced.

Posted on Nov 24, 2010

birdine cole

  • 2 Answers

SOURCE: turning heater on : combustion air switch failed to close?

i just oiled my switch and made sure that it turned freely and it started working

Posted on Nov 20, 2011

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1 Answer

I have a coleman/evcon model DGAT070bdf I have the thermostat set at 74 but furnace is shutting off at about 64 degrees I did notice that the mother board's green led light is blinking 4 times.


Steady light on - normal operation.
One flash - ignition failure.
Two flashes - combustion air switch stuck closed.
Three flashes - combustion air switch failed to close.
Four flashes - limit switch open.
Five flashes - gas valve energized with no call for heat.
Rapid flashing - reversed polarity.

Note: Color of light is green.

Oct 14, 2018 | Heating & Cooling

1 Answer

Combustion Air Switch Failed to Close


I have this furnace in two of my mobile homes. In both I had to take off the inducer motor (i think that's what it's called)..it has the clear air tube attached to it. Remove the 4 screws or top two if you have small fingers and give the wheel inside at the bottom a push. These tend to stick over years of use and in both cases once freed the furnace came on. I too had 3 flashes in both cases.

May 09, 2012 | Coleman Propane Forced Air Heater...

1 Answer

Furnace won't come on Green lights flashes 3 timesSays Combustion air switch failed to close.


Hello, the switch can fail to close for several reasons. A blocked or restricted flue pipe, water or restriction in small tubing going from pressure switch to inducer motor, weak inducer motor, or the switch itself is bad. Take off the small hose and try blowing through it, sometimes it could just be a small restriction in it.

Sep 16, 2011 | Heating & Cooling

2 Answers

Coleman combustion air switch failed to close


Hi, new switch can be found on amazon... here: Amazon com Coleman air switch. I hope this was helpful. Cheers

Nov 24, 2010 | Coleman Propane Forced Air Heater...

1 Answer

Combustion air switch failed to close


The combustion fan commonly known in the HVAC world as the Draft Inducer has a tube between the fan and the proving switch. The SUCTION from the fan is what causes the switch to trip and verify to the main board the inducer is up and going. Take that rubber hose off and check for obstructions between the two components. This video show basic furnace operation:


If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

Nov 02, 2010 | Goodman Heating & Cooling

1 Answer

The light indicator says that my combustion air switch failed to close,and i live in a modular home


The combustion air switch is closed by the air pressure from the draft inducer fan. You can check it with a voltmeter. When the heater starts to run check the voltage reading where two wires connect to the switch. It should be 0 vac if the switch is closed. Instead of starting the furnace, you could also remove one end of the rubber hose that goes to it from the draft motor and blow into the hose and see if that closes the switch. It may be just stuck. I almost forgot to mention the most important thing; make sure the draft motor is running. Let me know what you find. The air pressure switch is a safety feature to prevent the furnace from running if there isn't enough air supplied to the burner for proper combustion.

Sep 16, 2010 | Coleman Propane Forced Air Heater...

1 Answer

The furnace acts like it's going to kick on, but just shuts off..


Make sure there is nothing in the flue or intake air pipe. make sure tubing to the pressure switch is clear and that the combustion blower motor is running. If all these are okay the air switch may be bad.

Oct 04, 2009 | Heating & Cooling

2 Answers

Turning heater on : combustion air switch failed to close?


This air switch proves that the inducer motor is running and moving air. If not, check to make sure that the inducer motor starts and that the flue is free of restrictions.....eg. bird nest, ice/snow, or some other critter that found a new home.

Oct 03, 2009 | Coleman Propane Forced Air Heater...

1 Answer

Heater flashes 3 times says it means combustion switch failed to close


Combustion switch is your vent safety.. Check your vents outside for blockage, sometimes the intake pipe will freeze or frost up not allowing the preassure switch(vent safety)to close. putting furnace into a lock out.. you can reset the furnace by turning the power on and off.. if there is no power switch just remove the bottom door and reinstall...

Jan 08, 2009 | Coleman Propane Forced Air Heater...

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