Ask Experts Questions for FREE Help !
Ask
    franky ipde's Avatar
    franky ipde Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Feb 2, 2009, 09:44 AM
    Installed new W/R 1f85-277 t stat
    Hi,
    I installed a W/R 1f85-277 t stat for my trane xl90 furnace. The problem is that there is a switch on the t stat for either electric or gas heat. My furnace is natural gas. Do I need to set the switch for Gas or can I leave it on Electric? The furnace does work on the Electric setting but, my concern is that the blower comes on when the burners light up. With my old t-stat( another W/R) the burners lit and then the blower came on.

    The other thing is that in order to not to have to keep replacing the batteries every year there is a terminal for the Common. I have only four wires coming through the wall and I have connected them all correctly to the right terminals. How do I connect to the Common terminal to give the t-stat power all the time?

    Thanks
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Feb 2, 2009, 09:59 AM
    Do I need to set the switch for Gas

    Yes switch to gas if you have a gas furnce.

    How do I connect to the Common terminal to give the t-stat power all the time?

    Run a extra wire from the common furnace transformer wire to the C terminal of the thermostat.
    Read below

    http://www.white-rodgers.com/wrdhom/..._06_pg0180.pdf


    http://www.white-rodgers.com/wrdhom/.../0037-6560.pdf
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!

1f85-277 Thermostat [ 1 Answers ]

Hi, I have a old W/R thermostat that I am replacing with a W/R 1f85-277. There are four wires coming out of the wall. Red, Green, Yellow, White. The red wire is connected to terminal RC. The green wire is connected to terminal G. The yellow wire is connected to terminal Y and the white wire...

Replacing honeywell stat to an other honeywell stat [ 19 Answers ]

I'm switching my old stat to a new one that lets me enter a program. I have an electric central air furnace and a thermopump outside that provides heat and AC. I'm going from a honeywell CT3600 or so (looks the same as in the manual for that one but without the program buttons) to a RTH8500....

In the stat.e of Georgia [ 1 Answers ]

Someone told me it is now up to the mother of a child as to weather a father can give up his parental rights to a child in the state of Georgia, is this true? Are there any loopholes?

18-3 t stat [ 1 Answers ]

I have 18-3 coming out of the wall the problem is I have a new digital thermostat with no directions and I did not remove the old t-stat how do I find out what wire is what I live in a apartment with base board heat

Just 3 wire T-Stat connection, new stat, diff letters [ 6 Answers ]

Hi all, I've done tons of reading and can't find my specific wiring, tstat combo to figure it out... hopefully someone can shed some light on it for me. Natural gas forced air furnace, no air conditioning. Had a honeywell for the last 9 years, easy install, labelled easy. (but its dead) Wire...

View more questions Search