Trane XE 60 - Model TUP 120B960A0 - can the controller be updated?

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Old 04-22-14, 07:12 PM
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Trane XE 60 - Model TUP 120B960A0 - can the controller be updated?

I have a Trane XE 60 Gas Furnace, built in 1991.

It has been working fine - no problems, until 2 days ago. The thermostat calls for heat, but furnace does not come on.

The pilot is on, the thermostat clicks when calling for heat, and the blower can be turned on manually from both the thermostat and from the furnace directly.

I really enjoy fixing stuff and I am generally pretty good at it, so I want to buy a service manual and trouble shoot this correctly.

Where can I find the service manual????
 
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Old 04-22-14, 07:40 PM
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Welcome to the forums.


I can't find a single piece of service info on that model.
I was going to ask you if you posted the correct model but I can see it in your picture.

Is there a control board in the blower section of the furnace ?
Is there a sight glass in the blower door to see it ?
That unit has a standing pilot ?
 
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Old 04-23-14, 09:45 AM
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You may not be able to find a service manual, but you've got a pretty simple furnace.

First thing to do is remove the t-stat from the base and jumper R and W. If that doesn't work, post back and i'll give more info.

You'll probably need a multi-meter to troubleshoot it.

In general if the problem is electrical, you can fix it; if it's gas related, you really need to call a tech. Even if you get it going, you should have the entire furnace checked out for safety reasons.
 
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Old 04-24-14, 07:13 AM
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Thanks Muggle - I'll do this tonight and report back.
 
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Old 04-29-14, 07:26 PM
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OK. I jumped W and R - still no ignition. Pilot is on, fan comes on (t stat in fan ON position)
The relay was old and had caused problems in the past, so I replaced it -= no effect. This is a very simple furnace and I am determined to fix it myself. Any suggestions?
 
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Old 04-30-14, 09:26 AM
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There's a problem in the low voltage circuit.

Try this:

1. Jumper R and W at the t-stat
2. Open the furnace and check for 24vac at the gas valve. If there's proper voltage there, you have a faulty gas valve (don't change it yourself), if not...

3. Rule out the t-STAT WIRE: Shut the power off and disconnect W at the furnace. Jumper R and W at the furnace. (doing this wrong can blow the low voltage fuse)

4. If that doesn't work, trace the wires leading from the gas valve. Anything which can break the circuit powering the gas valve could be the culprit -> high temp limit switch (you may have a combination switch which takes care of high limit and fan operation), vent safety switch, rollout switch/fuse. Check each limit for resistance with the power off.
 
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Old 04-30-14, 08:09 PM
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Does this furnace have a circuit board?
 
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