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Heat will not blow

jackchips_2
jackchips_2 Member Posts: 1,338
The electronic ignition (spark) was lighting and continued to cycle on and off trying to do it's job but the gas would not flow.

The unit worked fine for him yesterday and has been working fine since-you have to love trouble shooting.

I appreciate the offer and will pass the information on.

Jack

Comments

  • Adam_31
    Adam_31 Member Posts: 1
    Heat will not blow

    I can here the system turn on, however no heat air (heat) comes out of the vents. I thought it could be the pilot light but I am clueless at stuff like this. Does anyone have any suggestions?


    Thanks,
  • Brad White_200
    Brad White_200 Member Posts: 148
    Pilot to Co-Pilot, do we have ignition?

    Adam-

    The wags around here will tell you that warm air heat always blows....

    Does the furnace (I assume an air system here) main gas valve turn on? Does the heat exchanger at least get hot?

    Normally, a warm air furnace starts the burner and once it reaches a certain temperature (to prevent cold air blowing and to preserve the heat exchanger from internal condensation if an older style), the fan comes on.

    There should be a fan control thermostat which does this and it could be shot. It also might be that the fan has an electrical disconnect switch that someone shut off and forgot to turn on.

    I would check the basic stuff first ("Do you have power"). I do not know your skill level so if in doubt, call a professional, but at least try the obvious non-invasive stuff before you do.
  • Call a pro...

    clueless is not a good way to start working on these things... ;)
  • jackchips_2
    jackchips_2 Member Posts: 1,338
    I am

    currently going through the same thing right now, Adam.

    I have a York furnace that the exhaust fan would come on, the electronic ignition would light but no gas.

    Being a plumber, I did the obvious and hit the gas valve, burner header with a small board-very lightly, and it fired up.

    Also, because I am a plumber, I called for service and the technician just left with the order to pick up a gas valve and electronic panel. Unfortunately for us the unit worked fine when he showed up but based on the diagnosis we think it is one of the two items mentioned earlier.

    This doesn't really help you although I share the advice of others to call a pro. I would not attempt to hit anything-LOL.

    Jack
  • jackchips_2
    jackchips_2 Member Posts: 1,338
    I am

    currently going through the same thing right now, Adam.

    I have a York furnace that the exhaust fan would come on, the electronic ignition would light but no gas.

    Being a plumber, I did the obvious and hit the gas valve, burner header with a small board-very lightly, and it fired up.

    Also, because I am a plumber, I called for service and the technician just left with the order to pick up a gas valve and electronic panel. Unfortunately for us the unit worked fine when he showed up but based on the diagnosis we think it is one of the two items mentioned earlier.

    This doesn't really help you although I share the advice of others to call a pro. I would not attempt to hit anything-LOL.

    Jack
  • jackchips_2
    jackchips_2 Member Posts: 1,338
    I am

    currently going through the same thing right now, Adam.

    I have a York furnace that the exhaust fan would come on, the electronic ignition would light but no gas.

    Being a plumber, I did the obvious and hit the gas valve, burner header with a small board-very lightly, and it fired up.

    Also, because I am a plumber, I called for service and the technician just left with the order to pick up a gas valve and electronic panel. Unfortunately for us the unit worked fine when he showed up but based on the diagnosis we think it is one of the two items mentioned earlier.

    This doesn't really help you although I share the advice of others to call a pro. I would not attempt to hit anything-LOL.

    Jack
  • jackchips_2
    jackchips_2 Member Posts: 1,338
    Hi Adam,

    I am currently experiencing a similar problem with our York furnace. The exhaust fan starts, which is probably what you hear, the electronic ignition lights but no gas will flow.

    Being a plumber with some heat background (dangerous) I opened the door and hit the header to the burners, very lightly, with a small piece of wood. Low and behold off she went. As Brad said, once the chamber was up to temperature the blower motor kicked in and all was well.

    NOT. The problem has become reoccuring, the wood was retired and the service company (on a service contract-which I recommend to all) was called.

    As Murphy's law would have it, the unit worked fine for him but we both agreed that it is either the gas valve or the electronic control panel. Notice I said we both agreed but heck, what else could I do?

    Seeing it is still fairly warm here in Mass we will see if the problem returns and then decide which replacement to try first-I'm opting for the panel.

    Now, you are probably wondering what this all has to do with your question and it is do NOT do what a semi-retired plumber first did but what I did next-call a pro.

    Good luck,

    Jack
  • Jack, does the pilot light

    from a spark and if so does the spark remain on or does it shut off? If proper troubleshooting is carried out by your pro he should know definitely what is wrong.

    If he needs a procedure have him contact me and I will e-mail it.
  • Adam do you in fact

    have a pilot light and if so is it lit? If not is it a spark ignition system?

    First thing after the pilot is do you have power? Check the fuses or circuit breaker.

    Is there a switch on the stairway that may have gotten shut off?

    Give some make and model numbers along with info on the gas valve and I will be able to take you further or simply call a pro!!!
  • My guess,,,

    on the wack the burners and it goes one is gas valve as it would be affected by the jarring and not the control. Sometimes corrosion on the GV terminals will cause this. Try removing the stake ons and cleaning the terminals up. Replace the stake ons while you're at it. Nothing better than an intermittent problem to work on! ;)

    Rapping on the control will sometimes also get things going as well in which case you'd suspect the control first.
This discussion has been closed.