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Trane Furnace/Honeywell Thermostat; Thermostat has no C/B, furnace has no power

Trane Furnace/Honeywell Thermostat; Thermostat has no C/B, furnace has no power


  #1  
Old 02-10-16, 07:04 PM
J
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Trane Furnace/Honeywell Thermostat; Thermostat has no C/B, furnace has no power

Hello. I've tried to do my research before asking this questions but it seems all posts are asking the reverse of what I'm about to ask. So...I have a Trane furnace that has two stage heating and my thermostat just pooped out. I bought a Honeywell to replace it. I am completely new to knowing anything about this stuff prior to running into this problem, but here's what I'm gathering:

My old thermostat connections: B(Trane's version of a C, or common), W1(1st stage heating, W2(2nd stage heating) G(fan), and R(power).

My new thermostat has all these corresponding connections, but no C or B connection. The manual says to leave ignore the C/B wire and tape it off. I did so, but I'm am NOT getting any power to the furnace. My common sense assumption would be that (with C or B acting like a ground to complete the electrical circuit), the current wiring setup isn't a completed circuit, therefore, no power.

Am I missing something here? Our house is going on the market tomorrow (!!) and it's imperative we have heat working. Any help would be GREATLY appreciated! Thanks so much!
 
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Old 02-10-16, 07:20 PM
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Verify that the batteries are correctly installed in the thermostat.
 
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Old 02-10-16, 07:24 PM
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Maybe your old thermostat didn't poop out. You may have other problems.

What happened with the old stat ?
 
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Old 02-10-16, 08:05 PM
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Never mind, I stared at the circuit board on the furnace for a while and found a blown 5amp blade fuse. I'm pretty sure that was my fault as I originally mis-wired the "B" lead to the "B/O" terminal on the new thermostat. This was before I started researching and thought "easy-peasy, just hook up wires to the corresponding terminals". Hardware stores are closed now, but I'm going to pick up a new fuse (or a few) up first thing and will try the new thermostat again.

Thank you very much for your replies!
 
 

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