Top brown picture is my old thermostat white is the new one , do I have it wired correct? On out side unit we have replaced motor, fuses, compassator ,cc contactor ,relay . We have a heat pump. But the fan still will not work to blow into the house enter image description hereenter image description here

  • Is that new thermostat capable of handing a heat pump with emergency heat? Not all of them can do that... That jumper between Y and W looks wrong, and I'm not sure you should have a wire going to R and Rc (those two commonly have a jumper). The picture of the new thermostat could be better - less blur and better colors. – JPhi1618 Apr 4 '19 at 18:28
  • Yes it can handle heat pump, and jumper between y and w was in the instructions, x which is the brown wire was hooked up in old thermostat but don't have an x in the new one – Roxanne Apr 4 '19 at 18:32
  • Link to the instruction manual would help or at least the model of the new thermostat and make of the old one. And again, just because it supports "heat pump" doesn't mean it supports emergency/aux heat (notice the X in aux heat). – JPhi1618 Apr 4 '19 at 18:34
  • New thermostat is a Honeywell rth221b, the old one is Rheem lr1620 , I think or t874r1442 – Roxanne Apr 4 '19 at 18:41
  • The old one has an em heat option but they jumped it to just use regular heat from what I could tell – Roxanne Apr 4 '19 at 18:44

These pictures seem to be programmer baseplates,programmer plugs into,if so the new base plate connections will differ.It has to be assertained by careful circuit comparison that all switching is observed,connection will be dependant on the control devices ,lettering of connections is normally used to assist following the instructions.You have taken on a tricky job,with instructions it is possible to get it right,experts sometimes have trouble.Check to see if the new programmer will plug into the old baseplate.Careful not to damage it,hope this helps Steve uk engineer.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.