ASYSTAT655A to White Rogers iThermostat

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ike609

Jul 22, 2008, 03:09 PM

hvac1000

Jul 22, 2008, 03:39 PM

I am changing from an ASYSTAT655A to a White Rogers iThermostat from TXU I have a heatpump system that was in the house when i purchased it.

I am just trying to switch to the new thermostat is all!

Original ASYSTAT655A
http://ike69.com/old/rt/old.JPG

New White Rogers iThermostat from TXU Similar to model: 1F85-275
Manual for 1F85-275 (http://www.white-rodgers.com/wrdhom/pdfs/instruction_sheets/0037-6488.pdf)

http://ike69.com/old/rt/new.jpg

Thanks, Gary

Here are some old wiring codes that may help you. You can see what the change overs are from old to new style. Everything you need should be on these. Since I am not there to help you figure it all out this is the best I can do. If you have any doupt as to the wiring test all circuits with a meter or follow them to where they land in the unit to verify what each wire is actually used for. I could guess but If you fried your new thermost or any other problems came up I do not want to be blamed.

ike609

Jul 22, 2008, 04:58 PM

Here is the book for the new thermostat i still cant seem to get it to do anything

http://ike69.com/old/rt/CHART.jpg

hvac1000

Jul 22, 2008, 05:48 PM

You have two white wires. One of them usually is orange that goes to the O or orange for the reversing valve and I see that is not hooked up.

BTW did you label the wires or just write down the color code because you have two white wires that I see and that could be part of the problem IF they were interchanged.

This si why it is so important to label them exactly before removal. The only diagrams is what I have provided.

How about a real model number for this White Rogers iThermostat

ike609

Jul 22, 2008, 07:11 PM

got it! blown 5A fuse on the ac unit...

I knew which white wire was which because one was longer than the other by quite a bit. After replacing the fuse the only thing was the blower was not blowing. I had 2 green wires as well swictched them and it worked perfect!

Model # is 1F88-270

manual is located here! http://mythermostatonline.com/pdf/SuperStatSpecs.pdf

Thanks for the help!

Gary