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#1 |
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Registered User
Trade: Engineer Hotel
Join Date: Feb 2008
Posts: 5
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Armstrong Ultra SX-90
Armstrong Ultra SX-90
Need help too: My Armstrong Ultra SX-90 Furnacehas a problem: here is what happens 1 power vent blower goes on 2 hear a click and ign lights and burner lights 3 after a second hear a click and burner goes off 4 after another second burner lights again and then click goes off 5 when I shut off power to unit and reset, it might work for a cycle or 2 Thanks for any help |
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#2 |
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Pro
Trade: hvac tech
Join Date: Mar 2006
Posts: 142
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Re: Armstrong Ultra SX-90
lazy [ dirty ] pilot flame not impinging on sensor and or sensor itself
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#3 |
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Registered User
Trade: Engineer Hotel
Join Date: Feb 2008
Posts: 5
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Re: Armstrong Ultra SX-90
thanks, I'll try that
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#4 |
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Historic specialist
Trade: General B100 Utah
Join Date: Jan 2008
Location: SLC, Utah
Posts: 65
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Re: Armstrong Ultra SX-90
our HVAC guy usually hits the flame sensor with a light emery cloth and it fixes the flame sensor problem...
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TD www.EnoceanWireless.com Wireless lighting control, without using batteries Use the Discount Code "Contractor" if you'd like... |
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#5 |
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Registered User
Trade: Engineer Hotel
Join Date: Feb 2008
Posts: 5
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Re: Armstrong Ultra SX-90
Thank you all
Here is what I did. 1 Cleaned flame sensor lightly with a nail file, very hard to get at. 2 Then I saw a burnt mark near a resistor on the curcuit board and start to clean and wiggle it. 3 replaced covers and reset unit and has been working for the last 18 hours |
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