Question about Goodman GMS90703BXA Heater

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Ignitor will not ignite. fan blows , it clicks, gas is smelled but no flame up.

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Replace the hot surface igniter.Be careful it is very brittle and don't touch the working end (fingerprints will cause premature failure)

Posted on Nov 03, 2010


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Why does the relay and control board keeps clicking the igniter doesn't come on, and furnance doesn't work?

It should only do that a few times then lock out necessitating reset by cycling the power at the furnace switch or at the t-stat. More than likely your hot surface ignitor is defective. Sequence should be something like this: Call for heat, combustion air fan initiates and blows for 30 seconds during a 'pre-purge' condition, then a relay clicks to energize the hot surface ignitor. If it does not ignite the flame within a few seconds, usually around 5 or 6 seconds, the ignitor relay clicks again and drops it out.

The flame sensing rod has to see flame to rectify the ground signal to the circuit board very quickly or else raw gas would continue to dump into the heat chamber. After the HSI relay drops out on flame failure the combustion air fan continues to run for a post purge cycle to purge the heat exchanger of any unburnt fuel before the sequence is initiated again.

Unplug the ignitor molex plug. It'll be within a few inches of the HSI itself. Insert a voltage test meter set to read 120 volts into the molex plug going TO the ignitor. Re-establish the call for heat, wait for a cycle of the relay clicks and steadily watch the meter. If the ignitor is bad, you should see 120 volts at the connection you are plugged in to AFTER the 30 second pre-purge. Watch closely, you may only have a 6 second window to see it because it will drop it out on flame failure.

Of course there are other issues that could be possible, but this is the most likely. If you do determine the ignitor is bad and you obtain a replacement DO NOT TOUCH the portion of the ignitor that glows (to ignite the gas) during assembly !!!! The oil from your skin will shorten the life expectancy TREMENDOUSLY.

Oct 29, 2014 | Dayton Gas Furnace Heater

1 Answer

Ignitor glows but short cycles

Ignitors don't "blow flames". But a defective ignitor can glow but not draw enough current to allow the gas valve to open to the burners.
Replace the ignitor. It's the "weakest link" and most likely part to wear out through use in the ignition system.

Sep 19, 2012 | Amana NGD5200TQ Dryer

1 Answer

I have a Rheem furnace rglh-10nbrjr that motor runs but flame does not light. If I turn up thermostat, the fan comes on and I hear a click after 10 or 15 seconds. I see no spark or anything from electronic...

Hi, you shouldn't smell any gas until the pilot flame is etablished. The sequence of operation is the small inducer motor will start on a call for heat, Then on the motor you should have a poly type tube, clear, that runs over to a pressure switch. It is a round silver part that the hose connects to, The pressure from motor closes a set of contacts and you will hear a click. This is telling the electronic ignition to start to spark and light the pilot or hot surface ignitor, which ever you have. If you have no spark and the pressure switch is closed, you have a faulty ignitor board or module. To check the switch, it will have 2 wires going to it. Just take a piece of insulated wire and touch across the 2 terminals. It should fire up. If not, the module or board, ignitor has failed. You will need to take all of the numbers from it amd go to a appliance parts house to get a new one. Don't forget how it wires back in, or you will have more problems.
A/C, Heating Contractor

Dec 28, 2010 | Heating & Cooling

1 Answer

The Goodman Heater was installed in 2004. Thermostat set at 75F, the fan that blows CO2 out was on for about 1 minute, then I could hear the sound of the gas blowing into the furnace, but the ignitor...

Problem: Your furnace will not ignite the gas to produce heat for your home. When a furnace has a bad ignitor 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 ignitor. I would suggest that you inspect your ignitor closely for cracks. Make sure you do not touch the ignitor with your bare hands. If you do not visually see a crack, then you could have a furnace control board problem or a limit, rollout 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.

Nov 30, 2010 | Goodman GMS80903BNA Heater

4 Answers

My minimax NT 400 heater will not ignite. The fan turns on. The start sequence proceeds as it should. Gas flow starts (I can smell it), but there is no ignition. The sequence repeats 3 times, and then the...

You may have low gas flow. This is tough to check but if you have a manometer you can check gas pre on the back side of the gas valve with heater off and then while it is trying to start. If you don't have a large enough meter or gas line this will often be the problem and give you the gas smell since it will feed gas but not enough to light.Good luck.

Apr 25, 2010 | Pentair Minimax NT Heater

1 Answer

Oven's ignitor is bright, I smell gas, but it won't lite.

if ignitor is brt orange to white its hot enough to ignite gas,either the flame sensor is giving wrong signal to control board and not opening gas valve or signals the gas valve to shut off gas before ignition,also your flame sensor could be faulty or control board is bad

Jul 26, 2009 | Kitchen Ranges

1 Answer

Heater problem

i concur, when flame is not sensed gas valve closes

Jun 13, 2009 | Pentair Minimax Ch 250,000 Btu Natural Gas...

1 Answer

Gas will not stay ignited

could be dirty heater you have to clean the runners and the smole nozzles that are in the manifold below the gas valve it's like a 9/16 size you pull them off and check make sure they are clear through, sometimes little spiderwebs build up inside them. if it's all clean, then it could be you flame rectifier/ aka: flame sensing rod, that tells the htr that there is fire so it keeps running. Let me know what happened.

Dec 29, 2008 | Pentair MINIMAX NT TSI IGNITER

1 Answer

Burner flame shuts off during use and then you smell gas

all ovens, when they reach temperature they go off and on to kip the temperature, but if you smell gas the oven ignitor needs replacing, the ignitor gets red hot to ignite the burner ,but when ignitor does not get hot enough, it will have a delayed, that's the reason you smell gas.

Dec 10, 2008 | KitchenAid KGST307 Gas Kitchen Range

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