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I had a similar call with no ignition, and was told it was running motor due to venting failure. I am still waiting for final answer from my boss this week as they replaced venting on friday.

I've always used the Honeywell with the continuous retry to prevent nuisance lockouts. Just needs a little rewiring.

Originally Posted by Workin4TheMan

Replace the roll-out switch. This is a common problem with these units. You will read continuity, and 24V through the switch to the R.O. terminal, but it will not pass the proper current to operate the board.

I was that kid once. Now I replace it with every failed module.

When the switch has limited current capability, you can read a voltage drop across the rollout switch when the circuit is energized.

Replacement of the rollout with the module IS a good idea.

Replace the roll-out switch. This is a common problem with these units. You will read continuity, and 24V through the switch to the R.O. terminal, but it will not pass the proper current to operate the board.

I was that kid once. Now I replace it with every failed module.

Originally Posted by alcomech

So whats it not doing now.

I have not heard from him so it must be working ok.


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So whats it not doing now.

Here is the one that York is supplying here. Attachment 323881Attachment 323891


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I've seen one before, just didn't remember it.

Originally Posted by timebuilder

The JCI replacement is the black UEI box.

Here is the replacement style module.Attachment 323681

Originally Posted by valdelocc

Call P&J !! we fix it the first time!!

That's funny this guy is from P&J and said he learned everything he knows from you. All kidding aside, I just wanted to get the kid some other thoughts on the issue since I knew I would probably not have time to go down and check out his issue. But he figured it out and learned a little from it.


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The JCI replacement is the black UEI box.

Call P&J !! we fix it the first time!!

Originally Posted by 2sac

Not familiar with UEI the Honeywell universal is grey, and I thought JC did make grey boxes at some point in time but I could be wrong.

I have one in my truck. I will check tomorrow and let you know the make. I know it's the JCI replacement.


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Not familiar with UEI the Honeywell universal is grey, and I thought JC did make grey boxes at some point in time but I could be wrong.

Originally Posted by 2sac

I reread the post. Sounds like the initial problem is/was the crossover tube and/or clogged pilot orifice and/or spiders nest. This is why he had to light with a torch. Does this unit have the blue Johnson Controls ignition modules? Those are designed to have multiple voltage inputs for them to fire. Even though you have 24v at TH, if any limits are open the inducer will run but you will not get spark.

He said they were grey boxes which means they were replaced. I think those are UEI boxes?


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I reread the post. Sounds like the initial problem is/was the crossover tube and/or clogged pilot orifice and/or spiders nest. This is why he had to light with a torch. Does this unit have the blue Johnson Controls ignition modules? Those are designed to have multiple voltage inputs for them to fire. Even though you have 24v at TH, if any limits are open the inducer will run but you will not get spark.

After looking at the wiring diagram I think he was talking about the ETD. Electronic Time Delay.


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Originally Posted by 2sac

You talking about the 3 wire limit correct?

yep.

This was in the control panel with the contactors and relays. I know about the limit by the heat exchanger. That was the first thing I had suggested.


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Originally Posted by beenthere

Ask him if he found that sequencer inside the side discharge panel(back panel). If so he reset teh high limit, which will trip if you shut the disconnect off during a heat call with teh burner running.

You talking about the 3 wire limit correct?