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heat pump thermostat

  1. HVAC
    Hello, I am trying to install a lyric T5 smart thermostat and it requires a "C" wire. my current setup is as shown in the attached picture. I have a wire ran to O, G, Y, Rh and a jumper from Rh to Rc. I have two additional wires (one white and one orange) bundled up and left unconnected in the...
  2. HVAC
    Ok...I have researched, read the manuals, studied the wire diagrams and am frustrated beyond belief. :furious: I have a Goodman heat pump that was not heating any more. Fan blew but did not heat. I bought a new Honeywell RTHL3550 thermostat to replace my old Janitrol HPT18-60. I connected the...
  3. HVAC
    I'm replacing an American Standard (ASYSTAT 570) tstat with a Hunter 44860 and the wiring codes are different. I have an American Standard 2-stage heat (heat pump), single stage cool electric unit. Old wiring: American Standard: Green Wire - G Blue Wire - B Red Wire - R Yellow Wire - Y White...
  4. HVAC
    I’m trying to replace my girlfriend’s old thermostat with a new programmable thermostat. I did this last night, but I couldn’t get the AC to come on… I’m hoping someone will see my error. Many thanks, Specs: Carrier: Heat Pump with Cooling Model # FA4BNF018 Product FA4BNF018 010 AAAA...
  5. HVAC
    I've got a Comfortmaker heat pump system from 1986. This unusually cold Florida winter has exposed some problems with it. I have noticed over the years that it has blown cold air in the house while defrosting but it's never really been an issue. Now with this sub freezing weather it's going into...
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