Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.

If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Need to contact us? Visit https://heatinghelp.com/contact-us/.

quick furnace transformer wiring question

i am replacing an old york 025-21911-001 transformer...while positioning it to snap a pic of the wiring before removing it, one of the wire clips fell off. with the 5 thermostat wires, there were 3 thicker gauge wires attached with a clip. an orange wire was connected on the W terminal, the blue common wire connected to C, then a white wire is what slipped off. it seems it had to go on the Y or G but i wanted to be sure....any help? thanks in advance

Comments

  • ratioratio Posts: 2,100Member
    A few pics might help. A pic of the schematic of the unit also.
  • No_Caller_IDNo_Caller_ID Posts: 5Member
    This is the pic I took for my reference, I just slipped the white wire on that terminal because it was approximate area it came from. This is all I have now as I left that property for the night, but it’s an older York gas furnace with central air connected
  • ratioratio Posts: 2,100Member
    Looks like the right spot.
  • HVACNUTHVACNUT Posts: 2,516Member
    edited February 23
    Which white wire? Theres two.
    Also bend the white on the Y terminal away from the C terminal a little.
    Post a pic of the wiring diagram. Theres usually an additional wire connected to the G terminal to energize the fan relay.
    The white wire on the Y terminal is factory wiring?
    I might be wrong but the Y terminal is typically just a spot to connect the Y from the thermostat and another wire that goes to the condenser.
  • No_Caller_IDNo_Caller_ID Posts: 5Member
    The thicker gauge white wire is the one in question. As I said it looks like it could have only been on Y or G. I put it on Y just for the pic, knowing that I was unsure of it.

    Not 100% sure but I think all the white wires, besides the thermostat white, were neutrals from the ac power...but this is based off memory and I won’t be back there till later today to verify
  • HVACNUTHVACNUT Posts: 2,516Member
    > @No_Caller_ID said:
    > The thicker gauge white wire is the one in question. As I said it looks like it could have only been on Y or G. I put it on Y just for the pic, knowing that I was unsure of it.
    >
    > Not 100% sure but I think all the white wires, besides the thermostat white, were neutrals from the ac power...but this is based off memory and I won’t be back there till later today to verify

    OK. Post the wiring diagram.
Sign In or Register to comment.

Welcome

It looks like you're new here. If you want to get involved, click one of these buttons!