Ask Experts Questions for FREE Help !
Ask
    payrollpete's Avatar
    payrollpete Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Feb 6, 2007, 12:33 PM
    Replaced Transformer on Trane heat pump still no power
    Today I woke to no power to thermostst. Through this site I found out about the transformer. Check power to transformer good 120volts each wire. But no voltage out. Replaced transformer. Wired red to red and white to white incoming power. And blut to black blue and red to black red out coming. Still power to transformer no voltage out. Is there a chance the new transformer bad or is the voltage to low to read-used a 0.1-600volt meter and no reding on output. Tred each wire to ground tried wire to wire nothing. Is power out DC?? :confused:
    rickdb1's Avatar
    rickdb1 Posts: 185, Reputation: 15
    Junior Member
    		  
    #2

    Feb 6, 2007, 04:14 PM
    With no wires connected other than line voltage to the transformer, you should have 24 volts across the low voltage load side of it...
    Allen4Val's Avatar
    Allen4Val Posts: 11, Reputation: 1
    New Member
    		  
    #3

    Nov 10, 2009, 05:25 PM

    If you check voltage going in to the transformer you should have 240 (give or take) If you do then the other side of the transformer should givr you 24 volts. It is very unlikely that your new transformer was bad when you got it but if you have a high voltage short you could have fried the new one as well. If you did the transformer should have gotten warn to the touch and you should be able to smell a burnt smell from it. It is best find the cause of why the old went bad. Remove all low voltage from the transformer and test the leads first.to be sure you have 24 volts coming out.
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
    		  
    #4

    Nov 10, 2009, 06:12 PM
    120 volts each wire... heat pump system? Was the thermostat switched to "OFF", or set to an operating mode, when you powered the system back up?
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #5

    Nov 10, 2009, 06:44 PM

    Old post
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
    		  
    #6

    Nov 10, 2009, 07:22 PM
    Quote Originally Posted by Joshdta View Post
    old post
    I'm practicing! You got a problem with that?:p
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Heat pump transformer [ 3 Answers ]

Where is the transformer and what does it look like and how can I tell if it is bad?

Replaced transformer [ 2 Answers ]

I had to replace the transformer on my furnace, the little switch beside the fan the on and auto was damaged too I couldn't find one so the man I got the transformer from said to just by pass it and tap it off,, well when I cut the air on ,the fan will come on automatic,, when I cut the heat on...

Transformer buzz on heat pump [ 4 Answers ]

We just got a new heat pump/furnace/airconditioner installed (Trane) and you can hear the "buzz" of the transformer on the outside unit all of the time. Our old unit did this, but I always assumed it was because it was getting old and something was wrong. Is this normal? And why is the...

Buzzing transformer replaced but still down [ 1 Answers ]

Hi, my furnace just quit working with no warning of any kind. Upon inspecting it I find that the transformer was buzzing and hot so I replaced it. The furnace is still not working, no sound. No pilot, nothing. It is a pilot-free,gas-fired, horizontal furnace(sears brand). Could it be the...

Trane Heat Pump tstat replacement with Honeywell prog - wiring question [ 1 Answers ]

I want to replace my Trane Weathertron tstat with a Honeywell RTH7400 prog one. I have a Trane heat pump with aux heat. I've been poring over these thread piece-mealing some info the follow is the result. The old wiring scheme: X2 - black O - orange G - green Y - yellow T - tan/brown R -...

View more questions Search