Question about Heating & Cooling
Hi,dont know how this will work but thanks even if its crap. so have evcon dgaa077bdta furnace in moble home and has 4 lights flashing. on non professional brother advice I turned off breaker main to furnace nothing. then have been reading to much professional and non info so instead of the agony of no air im more worried of carbon monoxide or gas leak cus im really hot and over excitable. i also turned this on off switch to off ,then on and nothing . this is to long but should i turn the main braker off or other switch to off just to be safe
Posted by Anonymous on
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Posted on Jan 02, 2017
You should be seeing 120 volts to the igniter. Anything less requires either a replacement of the transformer, start relay or control module.
Posted on May 30, 2008
first off buy yourself a honeywell stat, in my personal opinion lux stats are garbage, I have run into so many that are bad stats !!! but as far as your fan not shuting down, sounds to me like your fan center on your circuit board is bad and will not shut down the fan when needed, you will have to replace the circuit board, as the fan center is a part of the whole of the circuit board, hope that helps
Posted on Jan 20, 2009
SOURCE: i have a coleman/evcon electric
Have you tried to replace pressure switch for the combustion air. If your not sure where to find it if you pull the front panels off follow the flue pipe down to combustion chamber the combustion fan motor is either inside the flue pipe or out side of it not sure on the one you have but you should see two plastic tubes that connect to a barb onto the topside of the fan and one on the bottom they both should go back to the pressure switch. i hope this helps you if you have any more question or if this doesnt fix the problem just reply back to this message . Make sure fan is working when furnace starts up. It should be the first thing that comes on when there is a call for heat
Posted on Jan 21, 2009
My furnace did not have a reset switch on that particular limiter. I unpugged the switch, it had 2 wires, waited 15 seconds or so and then plugged it back in . Turned the furnace back on and the limiter reset itself.
Posted on Dec 24, 2009
On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.
What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).
Posted on Jan 14, 2010
Testimonial: "Thanks for the quick reply! Since the heater comes on and runs for awhile, just not up to the proper temp.I am going to think it is a faulty thermosta"
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