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Webb-Guy
Webb-Guy, HVAC Mechanic
Category: HVAC
Satisfied Customers: 2011
Experience:  maitenance tech at casto
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Trane ComfortLink II, XL 20i unit. I have an error 126 -

Customer Question

Hi. Trane ComfortLink II, XL 20i unit. I have an error 126 - tried cutting power to inside and outside for 5 minutes, it didn't fix.
JA: How old is the appliance? Have you gotten error messages before?
Customer: At least 6 years old. Yes, we've gotten the messages before.
JA: Do you plan on doing the work yourself?
Customer: If I can.
JA: Anything else we should know to help you best?
Customer: That's it for now.
Submitted: 1 year ago.
Category: HVAC
Expert:  Webb-Guy replied 1 year ago.

This error code is for low temp lockout. Turn power off to outside and inside unit. That will reset lockout fault.

Expert:  Webb-Guy replied 1 year ago.

Oh you already tried the power off.

Expert:  Webb-Guy replied 1 year ago.

Typically it happens because the temp is low and doesn't need to kick on?

Customer: replied 1 year ago.
Temp is 76 or so inside now, it's set to 72.
Customer: replied 1 year ago.
There's a water-level trip thing, but that's fine, too.
Expert:  Webb-Guy replied 1 year ago.

hmmmm give me just a minute to look into this.

Customer: replied 1 year ago.
K
Customer: replied 1 year ago.
The switches are two fuses by the unit in the attic, and a pull-out thing in the box by the outdoor unit, right?
Expert:  Webb-Guy replied 1 year ago.

yes

Customer: replied 1 year ago.
Researching?
Expert:  Webb-Guy replied 1 year ago.

yes I am just a moment please bare with me :)

Expert:  Webb-Guy replied 1 year ago.

The 126 is loss of communication between the equipment. This equipment "talks" back and forth, In the event the communication is interrupted you must turn off both the indoor and outdoor unit and then back on.

Then the thermostat will search once again for equipment.

Most of the time a full indoor/outdoor reset works. In the event it does not it would require a service call from a Trane dealer.

You will likely find a blown fuse or power issue in the outdoor unit.

Which in turn led to a communication fault.

Can you test the fuses you put in?

Customer: replied 1 year ago.
When I plug the fuses back in for the outside unit, I hear clicking in the unit, which suggests power is happening.
Customer: replied 1 year ago.
In researching this, it looks like there are codes I can view and adjust that can correct the problem?
Expert:  Webb-Guy replied 1 year ago.

I am sorry I dont follow what do you mean by codes?

Customer: replied 1 year ago.
Provided in the control panel.
Expert:  Webb-Guy replied 1 year ago.

Do you have that information available to follow?

Customer: replied 1 year ago.
Says something about getting into installer setup, but not how to do it.
Expert:  Webb-Guy replied 1 year ago.

Ok let me see what I can find give me just a second.

Expert:  Webb-Guy replied 1 year ago.

Have you done any recent updates on your thermostat software?

Customer: replied 1 year ago.
Not that I know of.
Expert:  Webb-Guy replied 1 year ago.

Can you try checking to see if you have an update in your software on it?

Customer: replied 1 year ago.
How?
Expert:  Webb-Guy replied 1 year ago.

press your help and then about button

Customer: replied 1 year ago.
I don't see a help button.
Expert:  Webb-Guy replied 1 year ago.

Ok I am going to open this up to other experts to see if they can help explain this to you.

Customer: replied 1 year ago.
Will this cost more?
Expert:  Webb-Guy replied 1 year ago.

No not at all

Customer: replied 1 year ago.
K, thanks.