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Old 01-10-2012, 12:42 PM   #76
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Heil Furnace Burner Problem


thinking the main blower would wait for a delay before running?
its a tempstar dc90 NTGM 100EHA3

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Old 10-14-2012, 12:51 PM   #77
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Heil Furnace Burner Problem


My DC 90 has done this for the past 3-4 years. Last year I broke down and had the unit serviced. The first guy that came out determined that it was a faulty thermostat. He placed a jumper between w/r and it fired every time. I replaced the thermostat and it worked for a while and then started doing the same thing. I jumped it again and it worked every time.

So, on to a new service company who replaced the pilot/ignitor. The other option was the gas valve but we started with the cheaper option. Same thing.Still intermittently not lighting.

My question is why would jumping w/r make it work every time? What does this do? Does this point to a solution in anyone's mind?
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Old 01-18-2013, 06:45 PM   #78
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Heil Furnace Burner Problem


Quote:
Originally Posted by younggun View Post
It could well be the igniter. The igniter is inside an enclosure with a small glass window. You should be able to see the flame, which should be a rich blue. Any orange in the flame is signs of trouble. Being that new, I would think the heat exchanger probably is an upgrade. The symptoms you mention seems to point to the igniter, see if there is vaccuum inthe system. You can disconnect the small vaccuum line and place your finger over it. You should get pretty good suction. The problem I had was that the igntier was actually operating as far as turning on the furnace, these was however, no feedback from the igniter to tell the control to heat.

Good Luck
There are several reasons that a furnace won't operate properly. Not many of which should be attempted to be repaired by a homeowner. I know everyone here has had a bad experience with service techs but what do you expect when you don't want to pay them. You say that it's not worth it but what value do you attach to your time and health. Get multiple bids on everything from car repairs to doctor diagnosis to HVAC repairs and you will have better results. IF YOU HIRE CRAPPY PEOPLE AT A CRAPPY PRICE YOU WILL GET CRAPPY WORK!
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Old 01-18-2013, 06:49 PM   #79
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Heil Furnace Burner Problem


Jumping Red to White normally bypasses the tstat and tells unit to operate in heat. If the unit comes on repeatedly when you do this then you have a bad tstat. If this is happening multiple times you need to find out what is causing the stat to fry.
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Old 02-12-2014, 07:01 PM   #80
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Heil Furnace Burner Problem


My Heil furnace would not light. You could hear it try but it would never fire up. 5 yr ago a service tech placed a small piece of aluminum tape as a wind block on on the the base of the ignitor. It was only about 2" x 2", he said the small fan that comes on during ignition was moving propane away from the ignitor.

I was having problems today, went up to the attic and watched the furnace try to ignite. The igniter would glow and furnace would try to light and then stop. THe Honeywell SV 9541 (Smart Valve) would flash a code 6 flash + 1 flash showing low gas. Replaced the aluminum tape in better wind shield and it fired right up

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