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Old 12-22-2016, 11:39 AM  
nealtw
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Originally Posted by madrussian View Post
With no other place to go I found a few pretty cool tools for the control board:
1. troubleshooting manual: https://www.manualslib.com/manual/55...?page=3#manual
2. Schematic for control board: https://arnoldservice.com/wp-content...structions.pdf

Using the troubleshooting flow chart, it has guided me back to the 120v/24v transformer. Got voltage going in, nothing coming out.
That could be a problem.


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Old 12-22-2016, 05:03 PM  
kok328
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Check around on the transformer. Sometimes they have a manual overload reset button on them.
Leave your meter on the hsi wires or at board during ignition and see if it ever gets that far.
Are you still showing 3 blinks?


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Old 12-22-2016, 05:05 PM  
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If you do replace the transformer put an inline fuse on the secondary.
Short in the system may have burned it up.
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Old 12-24-2016, 09:10 AM  
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Does the hsi glow red hot during the operation? That should happen next. Then, gas valve clicks open, flame sensor keeps gas valve open, low limit initializes, blower kicks on...
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Old 12-26-2016, 03:59 PM  
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It was the transformer. As soon as it was replaced, turned the system on, the HSI got red hot and gas flowed.
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Old 12-26-2016, 05:27 PM  
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It was the transformer. As soon as it was replaced, turned the system on, the HSI got red hot and gas flowed.
We love happy endings.
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Old 12-27-2016, 01:01 PM  
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I actually stumbled across the fix. When schematic was reading 24V, I was measuring in DC, not AC. Doh.

the flow chart led me to replace the xformer but I dont think it was the 24v side, I think the 120V side wasn't completely operational.
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Old 12-27-2016, 01:40 PM  
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Originally Posted by madrussian View Post
I actually stumbled across the fix. When schematic was reading 24V, I was measuring in DC, not AC. Doh.

the flow chart led me to replace the xformer but I dont think it was the 24v side, I think the 120V side wasn't completely operational.
You must of had 120 volts on that side and that is really all you can check on that side. After that anything that prevents you from getting 24 volts is the problem with the transformer.


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