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Old 09-26-2010, 11:27 PM   #1
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Heil Gas Furnace Not Lighting


My Heil furnace (installed 2007, Model EDD4X36JA2) does not light nor does small blower motor turn on, but hums seemingly from the board at the bottom by the main blower. When power is switched to furnace, LED on main board lights about a dozen times, then twice (off and on), then repeats (without stop) the two flashes. Air works fine. Is this the small fan, the igniter(s), relay switch, or the main board itself that's bad? Thanks for your advice.


Last edited by kasi42; 09-26-2010 at 11:29 PM. Reason: add nonstop flashes
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Old 09-26-2010, 11:37 PM   #2
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Does the manual have the flashing codes listed?

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Old 09-27-2010, 08:39 AM   #3
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Thank you for your response. I do not have a manual that lists the fault codes for LED on the main board. Are the codes available somewhere else?
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Old 09-27-2010, 12:49 PM   #4
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Heil Gas Furnace Not Lighting


look on the back of the blower panel for the codes
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Old 09-27-2010, 03:20 PM   #5
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Heil Gas Furnace Not Lighting


That is an ac model number not a furnace model.
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Old 09-27-2010, 05:18 PM   #6
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Heil Gas Furnace Not Lighting


Thanks for the information about the confusing of the AC number. Unfortunately, this is the only number on the front or inside the two access panels. It is a two-stage Heil furnace in a home 1750 square feet upstairs and approximately the same footage in the basement. Any suggestions where else to look for a model number?
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Old 09-27-2010, 05:38 PM   #7
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Heil Gas Furnace Not Lighting


pull the top front panel off and look at the right or left side.
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Old 09-27-2010, 08:21 PM   #8
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Heil Gas Furnace Not Lighting


Thanks, the only model number visible in the bottom of the furnace is H9MPT100J16C1. Is this a valid model number for the Heil furnace?
Thanks again.
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Old 09-27-2010, 09:12 PM   #9
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Yes.....
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Old 09-30-2010, 06:11 PM   #10
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Heil Gas Furnace Not Lighting


The green LED on the mother board of my 2006 Heil two-stage furnace, flashes twice over and over, after first flashing seven or eight times when power is switched on. The furnace does not light; AC works fine including furnace blower. Any suggestions what the two LED flashes or why the furnace smaller blower, ignitors, and burners do not work? Thanks for your help. Model No. H9MPT100J16C1.
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Old 09-30-2010, 07:28 PM   #11
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we've told you to look on the inside of the blower panel for the code.. I'll take a guess.. pressure switch stuck
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Old 10-01-2010, 12:50 AM   #12
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Heil Gas Furnace Not Lighting


I have checked both access panels on front of furnace; no fault codes are listed. If the two, repeated LED flashes indicate a stuck or faulty pressure switch, how difficult is this to replace? I'm an electrician but not an HVAC technician. Thanks for your reply.
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Old 10-01-2010, 02:40 AM   #13
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Heil Gas Furnace Not Lighting


Quote:
Originally Posted by kasi42 View Post
The green LED on the mother board of my 2006 Heil two-stage furnace, flashes twice over and over, after first flashing seven or eight times when power is switched on. The furnace does not light; AC works fine including furnace blower. Any suggestions what the two LED flashes or why the furnace smaller blower, ignitors, and burners do not work? Thanks for your help. Model No. H9MPT100J16C1.

You have a a press switch closed when it should open... your dondensate drain is plugged
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Old 10-01-2010, 05:06 AM   #14
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Quote:
Originally Posted by hvaclover View Post
You have a a press switch closed when it should open... your dondensate drain is plugged
What is a Dondensate drain?

Are they on furnaces made by Don?
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Old 10-01-2010, 06:15 AM   #15
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Beenthere, tsk, tsk.

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