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Starts up and runs but there is no heat ,have gas supply but burner does not fire ,looks like i ahve voltage to all componets except to the hi heat thermostat

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Check the thermal fuse in the dryer vent conduit near the exhaust vent,then the cycling and high-limit switches/thermostats,your radiant sensor on the burner tube,your glow coil that ignites the gas,and finally your boost and secondary solenoids on the gas valve for continuity

Posted on Apr 24, 2010

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My Insta_Flame gas fire place will not turn off completely. We ahve turned off the gas supply now, but before it still had a tiny flame burning even when turned off.


boy that is one sad excuse for a heating guy. how foes this thing flame on? if it doesn't have an electronic spark start mechanism then it operates with a pilot light that will always be going as it uses this small flame (pilot light) to ignite the gas when the thermostat turns it on.

Nov 21, 2014 | Heating & Cooling

1 Answer

Samsung gas dryer heats up and then stops. No lint in dryer trap or hose. What could it be? Heating Element? Reset button? Please help! !


The key to your issue is the gas dryer. you need to know how it works to be able to diagnose it. A gas dryer will only fire up if the thermostat calls for heat and the hi limit thermostat is not tripped and the gas valves open and the igniter fires. Any of these not working will not lt dryer fire up the heat.
lets assume the running thermostat is ok since it fires up initially and they seldom are intermittent. A restricted vent would trip the high limit t-stat quickly and would not fire up again till it cools down and resets, since you have stated that the vent is clear and unrestricted we will again assume the hi limit stat is not the problem
(it still could be if it was faulty and opened up prematurely, but again that is not one of the more frequent issues). The flame detector needs to be satisfied to continue the burn after flame is ignited. The detector is a simple device that is located on the burner plenum and is a bi-metal with a clear window that lets light (flame) through to a bi-metal switch that will interrupt gas supply in case there is no flame. these again are not on the most frequent list of parts going bad.
The most likely cause of this problem is a bad igniter. they glow orange on start up and ignite the gas. even though they glow orange does not mean they are good, most develop cracks in the ceramic material and are very brittle. If a crack is present you seldom can see it and often will look normal in operation, but once heated the second cycle of heat fails to ignite. This can be measured cold by resistance check compared with standard value. I often just change them on a hunch , saves time and part cost is not high. Labor time is often higher checking it's value. Another possibility is an intermittent gas valve and that is harder to diagnose and it is an expensive part. Seldom is the valve intermittent though.
This should give you a good start, good luck

Jun 27, 2014 | Dryers

1 Answer

Furnace will not start on it's own.


Hi Shelley, I'm sorry this is late, I have a back problem and often times can not sit at the computer. Removing the front cover causes a "HARD" reset to the furnace. That means, it breaks the line or supply voltage to the furnace. The main reason for requiring a hard reset is a failure to fire up correctly. The flame on the sensor can vary between lighting the pilot and the main burner ignition. The flame can be pulled away from the sensor just long enough to cause this type of failure before the main flame is sensed. The furnace will shut down thinking it is feeding in raw gas with no pilot present to ignite it. All of this happens in just a couple seconds. If there is a small window in the burner cover, you can watch it fire by holding the switch in by hand. If there is not an inspection window with a sealed combustion chamber, it would be best to call a good tech. as it is dangerous with such a short period to ignite while all that gas is flooding the combustion chamber. Without knowing exactly how to do this, it could explode. BE CAREFUL !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Dec 07, 2013 | Carrier Weathermaker 8000 Gas Furnace 125k...

1 Answer

Furnace burners won't ignite


Assuming this is a gas furnace, when the thermostat calls for heat the pilot heats an igniter to produce voltage that opens the burner gas valve. In your furnace, the igniter may have failed and the burner can't fire up

Mar 09, 2013 | Sport & Outdoor - Others

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Have a Fridgidaire GR6C-080C-16 furnace that runs for a few minutes then gas supply is cut-off. Furnace will then re-start and the run through it's pre-cycle, just as if the thermostat just called for...


It sounds to me like you have problems with the gas valve as you have eliminated pretty much everything else. I would check all wiring to valve,check for any breaks on the insulation and clean all connections.
When the burner goes out is the blower still running or does it quit then the burner go off? If that is the case I would think the thermal overload on motor was tripping. It makes me more inclined to suspect the gas valve due to the lack of any diagnostic code.
One other thing I would try is to check power to gas valve when burner is firing and see what it does when it cuts out.If it maintains power when gas shuts off then I would replace gas valve. Good luck and thank you.

Feb 14, 2011 | Heating & Cooling

1 Answer

After ten minutes the dryer stops and the filter light is lit


The glow-bar system sends electric current through a heating type of element until it glows hot enough to light the gas (this is used on most older style dryers) An I.R. sensor (infrared sensor) determines when the glow-bar is hot enough to light the gas, it then sends a signal to the gas valve to turn on.

To test this system, open the front cover where the burners are; start the dryer in the heat cycle; you should see the glow bar getting red hot (the glow-bar sits inside the burner box just above the burner tubes - there are two types; a round one that has spirals, and a flat one that looks like half of a coat hanger except smaller. If you have a hard time identifying them go look at the pictures of them in the store section) If nothing glows you will need to take a voltage reading across the glow-bar leads (there are 2) as you first start the dryer. No voltage means it's something else. Voltage means replace the bar (a replacement glow-bar should be kept in stock).

If the glow-bar lights and does not go off then the I.R. Sensor has failed. (I usually replace the glow-bar along with the I.R. sensor because one will take the other out, and it's just good maint. procedure to do as such.)

If the glow-bar lights for about a minute then goes off and you do not hear a click sound come from the gas valve (this click sound is the coil in the gas valve opening) then it's probably a bad gas valve coil (see below). If the glow-bar lights, then turns off (in about a minute) and the gas valve clicks on (and you can hear and/or smell that the gas valve is open) the burner tube holes are plugged and/or the glow-bar needs to be adjusted closer to the burner tube. To clean the burner tubes, you can either shoot compressed air into them, or remove them and run water through them. If it's an older dryer it's best to remove them and run water through them so as to get all the compressed lint completely out.
If you have a spark ignition (looks like a spark plug wire from a car...in fact it is.) The way that this system works is, instead of lighting the gas with a glow-bar, it lights it with a spark. To test the system, open the burner cover, turn the dryer on in heat mode, you should hear the gas valve click, and the spark igniter sparking, (in fact, it may even light the gas, but then goes right back off.) If this is the case then most likely the ignition cable is bad. Most people think that just because they can hear the spark, and see the gas light that the cable is OK, however, the ignition module sends a small amount of voltage the opposite direction through ground, through the fire, and through the high voltage ignition cable back to the ignition unit to let it know that the gas has lit. If the ignition cable has a even the slightest crack in the carbon core cable; that small amount of voltage cannot jump that crack like the higher voltage.... So replace the cable. (if it's a weekend and your faced with a downed dryer; either buy one from an auto parts store, or borrow one from someone's car...) The other thing that it may be is plugged burner tubes, if it looks like there is a lot of lint in the burner compartment you may want to try blowing out the burner tubes or removing them and rinsing them out with water.

Check circuit breaker. If it's a 220V machine be sure you have all legs of your power.

Check your neutral leads (I can't tell you how many times I've seen wire nuts come loose...) I've also had alot of power cords (especially 120V) go bad; check them.

Check control fuses, there's usually more than one. Sometimes they put them in the computer control board.

If there is a transformer in the main circuit (There may be two-one for the heat circuit, the other for the control circuit) be sure to make sure you have incoming and out going voltage according to the schematic voltage or it should say on the transformer.

Make sure door switch is adjusted properly or hasn't failed.

Check belt or chain.

Check the conduit going into the motor, sometimes older motors get hot and the mount fails causing them to rotate in their craddle and pulling out the conduit and wires. After repairing the wires you can run a large hose clamp around the motor so as to secure it. This will keep you going long enough until it's replaced.

If the dryer works only while you hold the start button on, it means the start circuit in the motor has failed (120V - 220V single phase system) I've seen people put tape over the button, however this should only be a temp. fix...replace the motor. For a three phase system, it's most likely the start relay is bad.
Be sure to check the main start contactor, these seem to fail quite frequently, they are usually located behind the dryer in the rear control panel.

Dec 21, 2010 | Bosch Dryers

1 Answer

Goodman GS9 propane furnace inducer motor runs continuously


it sounds like the low temp limit switch, the one that cools the furnace down with the burner off and the thermostat open, when it cools to a point the fan stops, the other switch in burner area turns burner off/on, hope this helps

Jan 31, 2010 | Goodman GMS90703BXA Heater

1 Answer

How do you pass a plumbing inspections with a 1956 Garland H283 ?


There may be multiple issues here.

Question: Is this being installed in a residence?

If so, I can see why an inspector might have a problem with that. Commercial cooking appliances, *especially* really old ones have next to NO safety devices on them. There might in fact be NO safeties on this thing at all. This means that if stiff breeze blows out the pilot light, it will keep letting gas into the room until something blows up.

This is much less of a concern in a commercial setting where: a) there's always going to be lots of ventilation and b) the gas supply is more than likely going to be interlocked with a fire suppression system.

If he's asking for documentation, it could also be because he's looking to make sure that the gas line & venting are sized correctly. If you're running natural gas, then 1/2" black iron should be sufficient for the gas supply if you're within 50 FT. of the meter, but it also depends on what else you've got tied in. Bumping the gas line size to 3/4" is what I'd probably do anyways

Without more info, there's little else to be said except that arguing with inspectors is like arguing with cats, but less rewarding. :)
Here are *some* SPECS anyways:

24,000 BTU natural gas StarFire burners or 20,000 BTU propane gas StarFire burners. 30,000 BTU race track even heat oven burner

Cheers.

Apr 24, 2009 | Garland H283 Gas Kitchen Range

2 Answers

The unit runs but no heat.


Your limit switch has tripped. You will find this small switch near the burner that is the size of a dime. Press the small button between the wires firmly to reset it.

Apr 16, 2009 | Dryers

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