Amana 90 Will Not Ignite

**jukelemon** · 03-16-2005, 04:41 PM

Hi all. Newbie here so please bear with me. A little background prior to the post. I am very mechanically inclined-rebuild engines, can follow schematics understand relays, circuits and the like.

My Aunt just moved here from Seattle. Her new house has two Amana 90 gas furnaces. I am guessing them to be 5 years old or less. She calls me two night ago stating that she cannot get heat from X vents. The house is divided not by floors but by sections in terms of circulation. So, I check the furnace designated to that side of the house and sure enough, nothing i.e. no flame. The other Amana is firing perfectly.

So, I did notice that the LED light was giving the one flash Lockout code. So, I cycled the T stat down for a bit and then asked her to cycle it up while I was watching the unit. The electric pilot came on, induction motor came on but no ignition.

Unit was running fine prior to that i.e. in normal use on a day to day basis.

Thoughts?

Thank you.

**Twilly** · 03-16-2005, 05:06 PM

replace the control board

**airworx** · 03-16-2005, 05:06 PM

no voltage to ignitor, bad ignitor, bad control board, gas valve bad, no voltage to gas valve, limit open. pick one

**bornriding** · 03-16-2005, 05:35 PM

The unit must verify that the inducer is on, if not the main won't come on.
The inducer has to prove that it is on.
Need a serviceman as different makes use different inducer sensors

[Edited by bornriding on 03-16-2005 at 05:37 PM]

**Twilly** · 03-16-2005, 05:56 PM

Replace the control board

**tlcartman** · 03-16-2005, 06:23 PM

Originally posted by twilli3967
Replace the control board

and you came to that conclusion, how ?

**beenthere** · 03-16-2005, 07:07 PM

Usually the pressure switch must close for the hsi to be energized.

**jukelemon** · 03-16-2005, 09:49 PM

Thanks for the suggestions. What are the ways, if any, to test the components that are listed in this post? Why would the control board be defective only after 5 years?

**billva** · 03-16-2005, 09:59 PM

Originally posted by jukelemon
Thanks for the suggestions. What are the ways, if any, to test the components that are listed in this post? Why would the control board be defective only after 5 years?

bacause the warranty is up.

**polar121** · 03-17-2005, 12:23 AM

check to see if the valve is getting the 23 volts, if not, trace it down, something is not letting the valve open. I beleive if the pressure switch from the vent fan is not operating the Electronic ignitor will not fire. sounds like to me the valve is not getting 24v. therefore not opening. Could be valve, rollout switch,etc. if all that is good, change the board. my advice, Call a serviceman.

**Twilly** · 03-17-2005, 04:05 PM

Replace control board

**htg guy** · 03-17-2005, 04:39 PM

Originally posted by twilli3967
Replace control board

As you can see there is good advice and also bad advice around here. This is the bad advice!

The furnace needs someone to check it out and properly determine the problem without just changing parts till its fixed. Just because the furnace is only 5 years old doesn't mean things can't fail. If there is indeed a failed part it needs to be discovered by troubleshooting.

**jukelemon** · 03-17-2005, 04:44 PM

Understood. I am assuming that only a serviceman has the specs to checkout voltages/valve operation and the like? Is there no simple way/non serviceman way to check ANY of these components so a narrowing down process can occur?

Thanks for your help. Keep it coming ( :

Thread: Amana 90 Will Not Ignite

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