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

    Jun 12, 2008, 04:15 PM
    Trane Heatpump AC Thermostat Wiring
    Hello

    I'm trying to connect a Trane Weathetron Heat Pump (Model TWX724A100A1)
    To a Honeywell RTH 7400D Programmable Thermostat.

    This is a new installation, so there is no previous installation to observe the wiring from.

    Currently, the wires that we have from the outside unit are as follows:

    White
    Yellow
    Orange
    Blue
    Red
    Green

    Connected to the thermostat as follows:

    White - Aux
    Yellow - Y
    Orange - O/B (supposedly the changeover from heat/cool)
    Blue - C
    Red -R
    Green - G

    **There is also a jumper from R to RC

    The thermostat is programmed with 170 as 7, and 190 as 0.

    Upon turning on the system for heat, it operates properly. Change it to cool, and it begins to switch repeatedly (you can hear it at the outside unit), from hot to cool, until you shut the unit off from the thermostat.

    Any indication on what could be the issue? Is the wiring correct? Thank you
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
    Ultra Member
    		  
    #2

    Jun 12, 2008, 05:58 PM
    Make sure you have the thermostat set up to energise the reversing valve in the cooling mode.
    NICEVILLE's Avatar
    NICEVILLE Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Oct 10, 2009, 07:14 AM

    What digital ac thermostat(s) are compatible to a weathertron model 3AAT80B1A1 thermostat?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #4

    Oct 10, 2009, 10:16 AM
    Your system style/design determines the type of thermostat you will use. Heat pump/electric heat/gas heat/oil heat/ with or without A/C. They all make a difference as to which is the proper one to use.

    The old model number you posted is for a heat pump system so you will need at least a 2 stage heat model.
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!

Wiring Thermostat Honeywell 8320U to Furnace-heat pump Trane XE78+XE1000 Combo [ 4 Answers ]

Hello, I have the following systems, each set is functional and individually controlled by two separate Trane Weathertron BAYSTAT240 thermostats. Set 1: Trane Weathertron: BAYSTAT240 Heat side Trane XE78: TUD080C936A1 (Date: 02/1993) Cooling side Trane XE78: TXCO36C4HPB0 (date H06) Heat...

Wiring a rth7400 honeywell Heatpump t-stat [ 2 Answers ]

I am at my witts end with trying to wire this T-stat I am removing an old honeywell heatpump M# T874D1165 and replacing it with an RTH7400 programmable I have 7 wires running out of wall, here's what I have, BROWN and WHITE hooked to W-2 (with jumper going to Y-2) YELLOW going to...

Wiring a Braeburn thermostat on a trane HP [ 7 Answers ]

Hi,I have a Trane HP.It is a package unit(one piece heat and cool).I am trying to wire up a Braeburn model 3000 thermostat to it.The wiring diagrams do not help.The trane is a 3 ton unit with heat strips.The wiring diagram on it shows typical wiring for a seven wire connection to thermostat.The...

Heatpump thermostat [ 1 Answers ]

I have a goodman heatpump with a janitrol 1890 thermostat it has never switched the aux heat on .When the temp gets too cold for heat pump to make heat .I have to turn emergency heat on myself .Book says model1860 thermostat is what should be installed is this my problem if so a new thermostat...

New wiring of heatpump split system [ 2 Answers ]

My house trailer has only electric heat. I have added the "A" coil and heatpump. I have replacaed the two wire thermostate cable with a five wire cable. One goes from the thermostate to the furnace the other goes from furnace to the outside unit. I'm using the two heaters as the aux heat. I have...

View more questions Search