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

    Nov 17, 2009, 08:39 AM
    Furnace won't light
    Have a very old model MAC 1165 intertherm gas furnace.The pilot is lit.Main burner will not come on.I disconnected the thermocouple and pilot stays lit. Please advise!It is cold in Texas today!
    WallyHelps's Avatar
    WallyHelps Posts: 1,018, Reputation: 136
    Ultra Member
     
    #2

    Nov 17, 2009, 10:59 AM

    I'd replace the thermocouple. It is relatively inexpensive, and easy to do. If it is bad, it will keep the main burner from lighting. If the valve itself is bad, it will be an expensive proposition, and you'd want a new thermocouple anyway.

    Good luck,
    WallyH
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
     
    #3

    Nov 17, 2009, 08:55 PM
    If the pilot stays lit with the thermocouple disconnected, you may have a non-100% shut-off gas control with a remote pilot safety device (usually what the thermocouple is connected to). Look for a reset button nearby. A faulty thermocouple may indeed be the origin of your problem.

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!

Gas Furnace won't Light [ 1 Answers ]

I am trying to light my gas furnace in my house but it won't light. I light the pilot and when I turn the dial to on the flame goes away and no gas in going through! What am I forgetting or doing wrong?

Furnace won't light [ 0 Answers ]

I have a trane xr80 and it won't heat, it is 3 years old and will only run in the on position not on auto. Blows cold air only, however the flashing light says nothing is wrong.

Bryant furnace won't light [ 1 Answers ]

We have a 13 year old bryant high eff furnace and the piolt light went out it says it has an auto start ---how do we go about making it light?

Oil furnace won't light [ 3 Answers ]

Ran oil of oil, restarted unit, it came on and then just shut down. I can't get it to come back on to even blead the line. It is like it has no power, I have hit the reset but nothing happens, and when it is tripped the light doesn't even come on on the control (Honeywell) with 45 second delay....

My furnace won't light and the lights on my control module won't come on [ 2 Answers ]

Ok a couple of question if you can help I have a comfortmaker furnace I believe 1999 it came on a couple of times after I bought a new transformer, board, capacitator, and ignition control module now it won't come back on What to Do! Also I wanted to know if you can tell me the difference between...


View more questions Search