Ask Experts Questions for FREE Help !
Ask
    Chef Grande1's Avatar
    Chef Grande1 Posts: 4, Reputation: 1
    New Member
     
    #1

    Nov 1, 2009, 08:47 PM
    Pilot is lit but burners will not light
    I have a Fraser-Johnston closet mounted Natural gas using Central heating unit. The unit has been off all summer and I just changed the filters and relit pilot. When I set the thermostat I hear it click at the right temputure for it to turnon but the burners don't even try to light.. Could it be just a thermostat issue or do I need to start shopping for a new unit.. I did not see a flame sensor.
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
     
    #2

    Nov 1, 2009, 08:58 PM
    Is the unit equipped with some type of Summer/Winter switch? If you just changed the filters, are the front panels securely attached to assure the interlock switch (if present) is engaged? Is the selector knob/lever on the gas control in the correct position?
    Chef Grande1's Avatar
    Chef Grande1 Posts: 4, Reputation: 1
    New Member
     
    #3

    Nov 1, 2009, 09:04 PM

    No. It is pretty basic heating only unit. The front panel is on but there is no sensor that would inhibit from starting. The knob is turned to on
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
     
    #4

    Nov 1, 2009, 09:09 PM
    I would start by attempting to verify the power supply to the unit. Check any switches, fuses, and/or circuit breakers present. If the thermostat has a fan selector switch, move it to "ON" and see if the blower runs.
    Chef Grande1's Avatar
    Chef Grande1 Posts: 4, Reputation: 1
    New Member
     
    #5

    Nov 1, 2009, 09:22 PM

    KC13 thank you for your quick responses. I checked circuit breakers and switches for the unit... all are on there is no seperat setting for fan or blowers.
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
     
    #6

    Nov 1, 2009, 09:28 PM
    Just for the heck of it (if you haven't already), try toggling the main power supply switch off/on a few times. If it is old and the contacts are burned/oxidized, this may restore function until you can replace it.
    Chef Grande1's Avatar
    Chef Grande1 Posts: 4, Reputation: 1
    New Member
     
    #7

    Nov 1, 2009, 09:37 PM

    Thanks. I will give it a shot. Nope...
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
     
    #8

    Nov 1, 2009, 09:44 PM
    If this is a heating-only system with no fan selector at the thermostat, there are probably only 2 control wires in the thermostat circuit. Try connecting them directly together (bypass the thermostat). Turn power off, connect wires together, and restore power. If this works, the thermostat is the culprit. This can be done either at the thermostat location, or where the control wire connects to the furnace.

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!

Carrier heating unit, we lit pilot but others burners will never light and so we have [ 1 Answers ]

:confused: We are freezing to ice cubes here, please someone help us with an answer. We lite the pilot on our Carrier system just as the instructions on the panel say to do, but when we turn it to on nothing happens. The blower blows cool air. The burners are not lighting inside. Last year...

Goodman pilot light on but furnace burners will not come on? [ 4 Answers ]

We have a Goodman furance that will not produce heat. The pilot light is on, the gas is released, but the burners will not kick in. Do you have any idea what is causing this problem.:confused: Scott's Chicago

Intermittent pilot light burns well but main burners do not light [ 1 Answers ]

I have an Olson furnace with intermittent pilot light with electronic spark ignition. There is a Honeywell S8610U furnace controller. When thermostat calls for heat the ignitor sparks and the pilot flame lights. The flame continues to burn while the ignitor continues to spark for about 5+...

Pilot light lit, but burners won't ignite? [ 4 Answers ]

I've got an older Williams model Propane furnace (model # 450sfa-2) controlled by a Lux 1500 Thermostat, and I've tried everything I can think of. The Pilot lights and stays lit, but the burners will not ignite. Any help will be appreciated, it's been cold the last few days (<45 degrees......

Furnace trouble. Pilot lights. Burners light but then go out. Evetually stay on [ 2 Answers ]

Hi all, I searched through this site a bit and found some helpful topics, tried a few things and I'm still have the same trouble. I have a Bryant furnace that uses a Johnson Controls G779LHA-1C Ignition Control. The ignition control is new, I just replaced it a week ago. It's hooked up so...


View more questions Search