Hi, new switch can be found on amazon... here: Amazon com Coleman air switch. I hope this was helpful. Cheers
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.
Blower motor not running fast enough for safety circuit
Could someone tell me where this switch is located? My furnace comes on when it wants to. If it doesnt this is the same code I get.
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.
SOURCE: Evcon, 3 flashes, combustion air switrch failed to
take the switch off and clean it really good and make sure that it turns freely that is how i fixed mine
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
SOURCE: flash code indicates that the combustion air
First, make sure that the draft inducer motor is running. Then check all tubing inside your furnace and ensure there are no kinks, moisture buildup, or cracks.......repair as necessary. Also make sure there are no blockages in your exhaust pipe.
If, after doing these three items, you continue to have a problem, let us know and we'll dig a little deeper. But 99% of the time, your problem is in one of these three areas. :-)
I hope you find this to be very helpful. :-)
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
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