Burner wonít ignite


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Old 09-21-21, 10:41 AM
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Burner wonít ignite

I have a Slant/Fin Victory II Model #VHS150 boiler about 15 years old. The burner stopped coming on following the spark ignite pilot light which just cycles between pilot light on and then off. I cleaned the flame detector and this temporarily solved the problem. But now the problem of the main burner not lighting has returned, so now Iíve replaced the pilot light assembly including the flame detector, and the problem remains.
Initially, when I turn the boiler on, the vent motor comes on, then the pilot starts but then after 3-5 seconds, the pilot shuts off. Ordinarily the main burner would then come on and begin heating the water. Any ideas on a solution would certainly be appreciated.
 
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Old 09-21-21, 10:48 AM
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If you've changed the pilot assembly that leaves the ignition board.
What ignition module does that boiler use ?
 
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Old 09-21-21, 01:53 PM
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Honeywell S8600F
 
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Old 09-21-21, 02:39 PM
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Could the gas valve also be the problem? I want to order any parts I might need. Wife is frustrated without hot water!
 
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Old 09-21-21, 03:05 PM
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Hi , this link has some TS that may be some help. https://s3.amazonaws.com/s3.supplyho...structions.pdf
Geo 🇺🇸
 
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Old 09-21-21, 03:10 PM
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Connect your meter to test for 24vac at the gas valve.
It will only be there when the burner should light.

I wouldn't replace a gas valve without confirming it's bad.
It wouldn't hurt to remove and reinstall the plug on the valve several times in case there is some corrosion there.
 
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Old 09-21-21, 09:04 PM
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Thanks for the help so far.
I used my voltmeter to check for 24vac at the gas valve. PV: 22 while pilot is on then 0, PV/MV: no voltage, MV: no voltage. Does that indicate my Ignition Module is not working? Iím a rookie at this as you can see!
 
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Old 09-21-21, 10:31 PM
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Power is on the section(s) of the valve that should be live.

Draft inducer starts. Pressure switch proves.
24v on PV (pilot valve) while pilot is lit.
After a few seconds 24v should appear on MV (main valve).
If burner doesn't light.... PV power is removed for a retry.
 
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Old 09-22-21, 06:32 AM
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Iíll try a new ignition module. Thanks.
 
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Old 09-22-21, 02:21 PM
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Okay - so I replaced my old Honeywell S8600F Ignition Module with the recommended S8610U and after switching the 24V terminal to TH-W and double checking the pressure tubing which had come loose, all is well. Thank you for the help.



 
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Old 09-22-21, 05:30 PM
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Good job. Thanks for letting us know how you made out.
 
 

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