Installed new thermostat, killing fuses when switching to heat
#1
11-01-10, 10:41 AM
Join Date: Nov 2010
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Installed new thermostat, killing fuses when switching to heat
Hello all,
My upstairs and downstairs thermostats are both newer and apparently wired wrong. I went by the manual and I keep referring back to it but it looks like it's wired correctly according to that which is causing me a migraine, lots of confusion, and a cold miserable family. They are both Lux TX900TS thermostats. The A/C and fan work fine but when switching to heat it kills the fuses instantly. Can I get assistance on this please? Below are pictures of the way it's currently wired. Top picture is downstairs and bottom picture is downstairs.
Also in response to the sticky.
"When you do post for help, please provide us the make and model # of the new and old thermostat itself, furnace/air handler, outdoor unit, and how many wires you have in the wall"
I unfortunately no longer have the old thermostats as the A/C worked fine all summer and didn't think to test the heat. What do I need to find out about the furnace? I have an A/C unit and does the heat as well. I hope the pictures of the wires help.
My upstairs and downstairs thermostats are both newer and apparently wired wrong. I went by the manual and I keep referring back to it but it looks like it's wired correctly according to that which is causing me a migraine, lots of confusion, and a cold miserable family. They are both Lux TX900TS thermostats. The A/C and fan work fine but when switching to heat it kills the fuses instantly. Can I get assistance on this please? Below are pictures of the way it's currently wired. Top picture is downstairs and bottom picture is downstairs.
Also in response to the sticky.
"When you do post for help, please provide us the make and model # of the new and old thermostat itself, furnace/air handler, outdoor unit, and how many wires you have in the wall"
I unfortunately no longer have the old thermostats as the A/C worked fine all summer and didn't think to test the heat. What do I need to find out about the furnace? I have an A/C unit and does the heat as well. I hope the pictures of the wires help.
#2
11-01-10, 09:14 PM
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Location: Rochester, Minnesota
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Originally Posted by carsnrockmusic
My upstairs and downstairs thermostats are both newer and apparently wired wrong.
it kills the fuses instantly.
What do I need to find out about the furnace? I have an A/C unit and does the heat as well.
#3
11-03-10, 07:43 AM
Join Date: Nov 2010
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I have dual stage I just found out. Heat pump and electric. I found out that I have the wrong thermostat that's not set up for dual stage and that is where my issue lies.
