Question about Goodman GMS90703BXA Heater

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Main burner will not ignite Tempstar(NTC5075BFD1)

When my furnace tries to turn on, the pilot light will light but the main burner will not ignite unless I blow lightly towards the pilot light to help it out.

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  • Goodman Master
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Try cleaning the pilot oriffice it sounds like the flame is weak

Posted on Jan 17, 2009

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When I try to use my Thermolaire model SU402E, the pilot lights( and stays lit), but the main burner will NOT ignite.. any suggestions as to what could cause this if the pilot stays lit?


Bad igniter? When you 1st try it the gas valve will give enough gas that you would get the burner lit if the igniter was glowing red. If you're desperate you can light the igniter area w/ an aim n flame, but you definitely want to do that w/ caution and crank up your t-stat so the furnace stays on awhile Cuz you'll have to do it again for heat or buy an igniter($40 or so)

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Have to think that the thermocouple has failed if the pilot is on but the furnace main burner doesn't ignite

Apr 05, 2014 | Cozy (W352E) Heater

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I have an older Carrier furnace type 58ss. The main burner will not ignite. Operating look ~ thermostat set @ 78 deg, switch furnace on, inducer fan running, pilot light clicks and ignites, inducer still...


power to gas valve ok .. Replace gas valve after checking gas valve coil for continuity/resistance... with valve removed ...and power to valve ... try blowing thru valve from supply side ... stuck valve.... replace...

Nov 01, 2013 | Heaters

1 Answer

Lennox furnace model G11Q3-110 v.2 burners light but go out before fan comes on


Troubleshoot an ignition problem on a Lennox gas furnace ...

? 2:44
https://www.youtube.com/watch?v=yXIxgzwMkPs
Nov 17, 2012 - Uploaded by grayfurnaceman
This furnace should light its pilot with a spark then the pilot proves its on ... Troubleshoot an ignition problem on a Lennox gasfurnace .... Pilot and no inducer but is the same model as that great video! ... You probably have dirty burners. ... How do you know spark module is not sending 24 volts to mv and pv ...

Lennox Furnace Model G11Q3-82-2 - RepairClinic.com



Nov 19, 2012 | Heaters

1 Answer

Janitrol GUPS075-3 Furnace burners will not stay lit


The first thing I would do is make sure the flame sensor is clean, this is a metal rod immersed in the burner flame on the opposite side of the igniter. If too much oxidation builds up on it, it will not allow the burner to stay lit. To clean, just turn off furnace and remove flame sensor and clean with steel wool and then reinstall. If this does not solve the problem there may be a problem with the gas valve.

Nov 08, 2012 | Heaters

1 Answer

Tempstar pilot turns off


Based on your model number this furnace does not have a pilot light,instead it uses a hot surface igniter.typically it glows and when it gets hot enough the gas valve will open and the burners will light.When the igniter starts to go bad it will glow but not get hot enough to open the gas valve.If your furnace lights and the quickly goes out the flame sensor maybe dirty.

Oct 07, 2012 | Goodman GMS90703BXA Heater

1 Answer

My dv35 wall furnace pilot light on main burner will not light


lightly tap on the area where the wires are connected. the valve will stick at times. try that.

Oct 30, 2011 | Empire DV-35 Heater

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Heater doesn't come on?


The electronic ignition system in a gas furnace is a modern development that allows more reliable performance than standing pilot furnaces, provides energy savings and contributes to better furnace efficiency (AFUE). With a standing pilot, found most commonly on older low efficiency furnaces (55% to 65% AFUE is not uncommon), a small gas flame is always burning and is known in the lexicon of American home repair as a "pilot light". The problem with this type of "analog" ignition is that it wastes energy by constantly burning gas and can sometimes be unreliable. These issues have led to the development of electronic ignition systems for mid to high efficiency furnaces that exceed the U.S. government's established minimum AFUE rating of 78%. The electronic ignition occurs typically in one of two ways:
  • Intermittent Pilot, or
  • Hot Surface Ignition The intermittent pilot system uses an electronically controlled high voltage electrical spark to ignite the gas pilot and then subsequently the main burners, when the thermostat calls for heat.
    The hot surface ignition system uses an electronically controlled resistance heating element not unlike a light bulb filament (and shown in the photo above), to ignite the gas burner.
    It is important to understand some of the other components of a modern furnace that you will encounter depending on the type of high efficiency furnace you have. Why? Because they can also come into play in repairing an electronic ignition furnace when it won't run properly. Let's take a quick review of the types of furnace designs and components found in high efficiency furnaces using electronic ignition.
  • Nov 14, 2010 | Goodman GMS90703BXA Heater

    1 Answer

    I need to replace a gas furnace thermocouple on a Tempstar gas furnace. How do I do this? Part # SV9500M2682 on Tempstar model # NUG5100BHB2


    HI follow the thermocouple lead back to the gas valve undo the silver nut foloow the lead back to the pilot and undone the nut on thermocouple or it may just pull out , or the burner might have to come out to replace it , if you arenot sure on this then a local gas fitter will do this .

    Jan 26, 2010 | Heaters

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