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NO MAIN GAS

NEW FURNACE THE IGNITER LIGHTS BUT NO MAIN GAS

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I can help , If your positive there is 5psi + of gas going to the unit and you have tied the red low voltage wire with the white low voltage wire or R term. to W term. on the board or low volt. term board together and there is still no gas the problem is a bad gas valve , they are notorious for failing. Hope this helps you out , let me know if you have any more questions or problems. good luck Phil

Posted on Dec 31, 2008

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My furnace will not ignite


If it has a glowing igniter, that must mean it is a Gas furnace?-- LP or Natural Gas?-- We need to establish a few things like:
1.) Is there a good supply of Gas?
2.). When the Igniter starts to glow, can you hear a gas valve click'?- and then is there a small flow of Pilot gas? (over the area where the burners will need to flow gas-- so the gas in the burner tubes can be ignited safely.)
3.) There is a circuit somewhere in there, that detects that you have established FLAME-- (Usually a 'flame rod' that allows the main gas valve to open.) Can you see the 'pilot flame' touching that rod? A very small electric current is actually conducted thru the flame, -- completing the circuit that allows the safety circuit to go to the next step, before it opens the main gas valve.)
These things have to exist, before the safety circuitry allows the main gas valve to open.
Tell us more, what you observe, as you try to start it again.
Mack B

Nov 29, 2016 | Heating & Cooling

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Home Heating Repair - How to Change Your Gas Furnace Igniter


You have run all the tests and they all point to your igniter being bad in your gas furnace.
Your purge blower runs, the power comes on to the igniter, but you get no glow from that little wonder. How can it be changed?

Changing the igniter on your gas furnace really is not all that hard. But it may require a bit of patience and some tools that can get into some very tight quarters. Some furnace manufacturers have design their units to make this job very easy. Some other engineers obviously have never got away from their desk and picked up a screw driver. Hopefully you are lucky enough to have one of the easy ones.

The higher the efficiency of your furnace the harder this job will be. Usually the 90+ furnaces will have the burner compartment sealed. You will have to get the covers off of the burner compartment to get to the igniter. On the 80%er’s the igniter will usually be somewhere on the burner nearest the center of all the burners. Make sure that you remove all power to your furnace before you attempt to remove the igniter. It runs on 110V power and will give you a good jolt if you touch it with power going to it.

Once you have located the igniter, you will need to find the screw or screws that hold the igniter in place. Remove or in some cases just loosen the screw and remove the igniter. Take careful note of the location and position of the old igniter so that you can reinstall the new one in the exact position as the old one. In most cases the wiring will just be a Molex plug that you can just unplug the old igniter and then plug your new igniter back into it.

Carefully position the new igniter into the same location and tighten the screw(s) that hold it in place. Plug the new igniter into the plug and replace the covers on the burner compartment if there is one.

Now you can turn the power back on to your furnace and try for ignition. Hopefully you get the glow and ultimately fire in from the burners. This will give you heat and make everyone happy!

http://www.fixya.com/support/r4015846-furnace_ignitor_care_home_furnace

on Dec 06, 2009 | Heating & Cooling

2 Answers

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)

Jan 14, 2015 | Heating & Cooling

1 Answer

My York furnace sometimes doesn't completely ignite


A noisy inducer probably is headed for replacement.

The igniter can produce a healthy glow and still be defective. Mine had to be replaced with a new, improved one.

The thermocouple could be defective even though it seems to open the gas valve when it should.

The heat sensor in the bonnet could be defective. That controls main blower operation.

The heat exchanger could be cracked.

Jan 10, 2014 | Heating & Cooling

1 Answer

Light pilot reset


If yours is a high-efficiency furnace, you should hear the stack blower start running when your thermostat calls for heat. Next, the igniter should start to glow and remain glowing until the thermocouple opens the gas valve and allows gas to flow to the main burner. The main burner lights and burns until sufficient heat is generated for the main blower to turn on and blow warm air through your house. If any action does not occur in the order described, repairs are in order.

Dec 08, 2013 | Kitchen Appliances - Others

1 Answer

My goodman furnace keeps lighting for about 10 seconds than goes out lots of clicking sounds


Problem: Your furnace will not ignite the gas to produce heat for your home. When a furnace has a bad igniter what I see most of the time is the following sequence of operation:


1. Thermostat calls for heat.
2. Draft inducer motor starts.
3. Pressure switch attached by a small plastic or rubber tube senses the negative pressure produced by the draft inducer and closes.
4. Draft inducer runs for 30 seconds to a minute before you hear a gas hissing sound. The ignitor did not glow, the flame sensor (a small metal probe about 1/8" in diameter, with a white porcelain base) does not sense the flame, so after 8 to 10 seconds the hissing sounds stops with no ignition of gas to heat your home. Your furnace shuts down and goes into a lock out condition until you turn your power switch back off and on again. Then the sequence starts all over again with no ignition of the gas.
Solution: You probably need to purchase and install a new igniter. I would suggest that you inspect your igniter closely for cracks. Make sure you do not touch the igniter with your bare hands. If you do not visually see a crack, then you could have a furnace control board problem or a limit, roll-out switch problem. The furnace's control board might not be supplying the voltage to the ignitor. If your furnace lights and the gas stays on for 8 to 10 seconds, then shuts right back off, then you need to clean your flame sensor with light sand paper or steel wool. You might need a new flame sensor, but most of the time they can be cleaned an will work well after cleaning.

NATE, NCCER, PHCC,HVAC Certified Instructor

Oct 25, 2010 | Heating & Cooling

1 Answer

My York Stellar PLUS furnace (Model P2UDD12N07601C) will not stay on; The ventilator fan runs, the main blower runs, the igniter comes on for approximately ten (10) seconds and you can hear the gas valve...


Check gas pressure, inspect manifold & make sure there is not a blockage.Make sure gas is present and main gas shut off valve to furnace is on also check the knob on the 24 volt gas valve and see if it is in the on position , check the MV terminal on the gas valve to 24 volt common with a volt tester to see if you have 24 volts present, if you do have 24 volts at gas valve, replace valve. if you do not have 24 volts at gas valve check high limit control & roll out limits for a open circuit, Good luck.

Feb 20, 2010 | York Furnace Draft Inducer Blower Fasco #...

1 Answer

I hope that I can get this problem resolved. Can there be a thread started to help me through this? I will try to keep this as short as possible, I have a Ducane Mod. CMPB050C3A Nat. gas furnace. The...


say that you have the glow bar (Hot surface igniter) working
if the flame starts make sure you don't trash on the orifice of the burner, you can try to use a piece of wire or someting small to pick on the orifice of the burner, also make sure is not rust bewteen the burners gap where the flame spread to all the burners because if the flame sensor don't feel flame don't stay light up
hopes this help

Oct 09, 2009 | Heating & Cooling

1 Answer

Hi, my problem is i have gas (propane) to the valve ,it has electric ignite , also hook up to a remote system i do not have the remote, there is a bypass setting,the igniter works still no pilot light.i...


The gas company should have have set and adjusted the gas pressure when they installed the new regulator. DO NOT ATTEMPTED TO LIGHT THIS WITH A LIGHTER. If this furnace has a hot surface igniter you and you lighter will be energized with 120 volts...BE CAREFUL...
If this furnace has a spark igniter you and your lighter can be lit up with up to 10,000 volts.
Since this furnace sat inoperative for so long I will bet that you have a blocked pilot assembly. Turn off the power and the gas. Carefully remove the pilot assembly. Dismantle it. Inside you will find a very small orifice Clean it out. Put every thing back together. The furnace should work.
REMEMBER PROPANE GAS IS MORE VIOLENT THAN NATURAL GAS KEEP YOUR FACE BACK AWAY WHEN IT LIGHTS IF YOU WANT TO KEEP YOUR EYEBROWS.
The clunking noise you heard was probably the gas valve trying to open.

Feb 19, 2009 | Heating & Cooling

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