I just tried both new thermostats in the upstairs (5-wire)I just tried both new thermostats in the upstairs (5-wire) locations and neither one works. After mounting the front of the unit, it's still dark, but it turned on the heat.… read more
gotoman for ac
HVAC Service manager and owner
Associate Degree
5,426 satisfied customers
I have a Trane 4TTR7 2 stage condensing unit with a Trane 2I have a Trane 4TTR7 2 stage condensing unit with a Trane 2 stage furnace system, but the 4 ton condensing unit can't cool down my 2nd floor effectively, it's not cold at all, It was installed 2 years… read more
airheatman
Heating & Air Conditioning Contractor
6 years college
10,060 satisfied customers
We have model #tam8a0c48v41cba, and we just bought a newwe have model #tam8a0c48v41cba, and we just bought a new wifi therm. By honeywell. it says we need to hook a wire to the com connection on the motherbord.. an you tell me which letter to hook the wire… read more
BillyHvac
Journeyman HVAC Tech
State Licensed Mechanical Contractor
23,718 satisfied customers
Riichard, I have a Trane 100xl with a Honeywell T841111RHi Riichard, I have a Trane 100xl with a Honeywell T841111R 1028 themostat, I am trying to replace it with a Honeywell rth7600d 1006n. the old wiring is g,c,r, w1 and y jumper together with a wire con… read more
airheatman
Heating & Air Conditioning Contractor
6 years college
10,060 satisfied customers
Jerry, last winter I switched my old trane weathertron forHi jerry, last winter I switched my old trane weathertron for a honeywell rh7500d and at the time I only checked if the heat was working (which it did) but now that it's summer I've realized the ac is… read more
airheatman
Heating & Air Conditioning Contractor
6 years college
10,060 satisfied customers
I have a 4 wire carrier infinity thermostat trying to convertI have a 4 wire carrier infinity thermostat trying to convert to Honeywell Wi-Fi thermostat. I have a natural gas furnace w A/C 4 wire system. Not sure how to wire new Homwywell therm. Green, yellow, … read more
Appliance Guru
21,422 satisfied customers
My Honeywell thermostat needs power on Terminal C. The WhiteMy Honeywell thermostat needs power on Terminal C. The White Rogers controller, model number 50A50-405 at the furnace has no power on C. I have a Forced air gas heater NO A/C. The OLD thermostat had o… read more
Heath.M
Refrigeration Mechanic
Vocational, Technical or Trade School
223 satisfied customers
Hey Richard, I bought a new WiFi thermostat for my furnace.Hey Richard, I bought a new WiFi thermostat for my furnace. Everything worked fine with the older programmable thermostat but I have another use for that. The old Tstat used batteries the new Tstat do… read more
Richard
District Technical Manager
Vocational, Technical or Trade Scho
1,514 satisfied customers
I have a trane 3aat80a1a1 I followed the wiring you told aI have a trane 3aat80a1a1 I followed the wiring you told a guy two years ago but it didn't work. I have a honeywell pro 5000. The old therm. was o, blu, t, g,y,x2,b,ww with some jumper of w to the u?… read more
gotoman for ac
HVAC Service manager and owner
Associate Degree
5,426 satisfied customers
I am trying to hook up a venstar t1700 thermostat to my interthermI am trying to hook up a venstar t1700 thermostat to my intertherm model MGHA-056ABFC-02. The old thermostat was only a two wire hook-up and I cannot seem to get my venstar to work. It powers up but k… read more
Brian HVAC Guy
HVAC Technician
High School
1,029 satisfied customers
Hi, Have a Trane T8411R 1077 non programmable thermostat.Hi, Have a Trane T8411R 1077 non programmable thermostat. Want to replace with a Honeywell TH4210D1005 programmable Thermostat. Current wiring to the old Trane Thermostat has: G - Green Wire B - Blue … read more
BillyHvac
Journeyman HVAC Tech
State Licensed Mechanical Contractor
23,718 satisfied customers
I am replacing a Honeywell themostat (conventional furnace/airI am replacing a Honeywell themostat (conventional furnace/air conditioner) with a Honeywell RTH6350. Neither the furnace or air conditioner turns on with new themostat. Not sure about wiring. OLD: G … read more
ComfortZone
Associate Degree
515 satisfied customers
I am replacing a Honeywell T841 with teh RTH7500. My existingI am replacing a Honeywell T841 with teh RTH7500. My existing wires are G,Y,O,R,W2, And X. I placed G on G, Y on Y, O on O X on C, R on R, W2 on on Aux, and E on E. I programmed the thermostat for Hea… read more
Mark Henley
HVAC Controls DDC
3,216 satisfied customers
i have a step down transformer and would like to know how toi have a step down transformer and would like to know how to integrate into my system. I have R, W, Y, G and have unravelled the blue to get 24VAC to my thermostat. Do I disconnect the R from it's cur… read more
gotoman for ac
HVAC Service manager and owner
Associate Degree
5,426 satisfied customers
I didnt write down the wiring for my thermostat and now iI didn't write down the wiring for my thermostat and now i cannt get the old one working or the new one Trane weathertron heat pump Honeywell thermostat… read more
Tim H.
Lead building engineer
Vocational, Technical or Trade Scho
3,962 satisfied customers
I am trying to replace a Duo-Therm/ by Dometic with the HoneywellI am trying to replace a Duo-Therm/ by Dometic with the Honeywell RTH7500D. The old one is wired +12/red cool/yellow Fur/white High fan/blue fan/orange gnd/black. this is in an RV. The Honeywell therm… read more
Kenton Guidry
HVAC Technician
Vocational, Technical or Trade Scho
963 satisfied customers
REPLACING WEATHERTON TRANE MODEL THERMOSTAT #BAYSTAT239.......8REPLACING WEATHERTON TRANE MODEL THERMOSTAT #BAYSTAT239.......8 WIRES G O X2 Y T R W B HONEYWELL TH4210D HAS .... E AUX Y G O L R B C SO WERE DO THE COLOR WIRES BLUE BLACK WHITE TAN GO ON THE HONEYWEL… read more
Mr. Case
Technician
High School or GED
2 satisfied customers
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