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Old 01-29-2011, 07:46 PM   #1
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Trane X1000 120/24VAC Transformer


Guy's I have a problem that I need your help with. The 120/24 VAC transformer primary side was shorted, so I first thought maybe something was wrong internally, but I found no shorts. I replaced the transformer today but check for any shorts before doing so, turn the heat on and everything was good, or so I thought. I went to the store and came back to find the new transformer shorted on the primary side too. I removed the transformer and checked with my multimeter and found nothing shorted. What could cause 2x transformers to go out? It was working fine, no problems. Any help is appreciated.

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Old 01-29-2011, 07:51 PM   #2
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Trane X1000 120/24VAC Transformer


did you check for a short on the low voltage side. T. stat wires etc?

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Old 01-29-2011, 07:54 PM   #3
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No I did not. Before I left to go to the store after replacing the transformer it was working again. I will check to see if there is a short on the tstat
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Old 01-29-2011, 07:58 PM   #4
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Low voltage short will burn out primary side of transformer
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Old 01-29-2011, 08:00 PM   #5
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I checked at the furnace terminals and no short. Could the tstat be going out and knock out the transformer?
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Old 01-29-2011, 08:03 PM   #6
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how does your t.stat wire run. Crawl space, etc. it could be shorted any where
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Old 01-29-2011, 08:04 PM   #7
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The wires have not been touched, so I would hope there isn't a intermittent short with the wiring.
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Old 01-29-2011, 08:05 PM   #8
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From the basement up to the tstat...about 10 feet away.
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Old 01-29-2011, 08:05 PM   #9
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mice love to chew on wires. That's why I asked if they ran through a crawl space.

Last edited by kenmac; 01-29-2011 at 08:07 PM.
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Old 01-29-2011, 08:07 PM   #10
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Course the tstat is dead right now with no power. Its a honey well about 8 years old. Would that be the only thing possible knocking out the transformer you think?
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Old 01-29-2011, 08:10 PM   #11
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The control board in the furnace was toggling the red light on and off like normal. Do you think I should buy a new control tstat and transformer, with the thought being the honey well control as the suspected component knock out the transformer?
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Old 01-29-2011, 08:10 PM   #12
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Quote:
Originally Posted by Slim2011 View Post
Course the tstat is dead right now with no power. Its a honey well about 8 years old. Would that be the only thing possible knocking out the transformer you think?

The only thing That I have found that kills transformer primary is a short in L V is the x1000 a hp ? If so check the wires there

Last edited by kenmac; 01-29-2011 at 08:13 PM.
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Old 01-29-2011, 08:17 PM   #13
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I'm not sure what all is on the low voltage side? I know the transformer supplies the 24VAC to the board, but not sure what really goes on inside the board.
What about the wires outside to the compressor? Can I isolate the problem by turning on the air instead of the heat? Just a thought, trying to think of a way to find the problem.
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Old 01-29-2011, 08:23 PM   #14
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Yoiu are just going to have to find your short. You can add a fuse to the LV to prevent future transformer burn outs. But, you have to locate the short
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Old 01-29-2011, 08:26 PM   #15
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Okay, thank you for your help. What size fuse do you suggest?


Last edited by Slim2011; 01-29-2011 at 08:30 PM.
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