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I have a reznor x125-3 lp furnace the looses the pilot flame when the setpoint is reached,or i lower the thermostat below the ambient setting.If I relit the pilot it stays lit until the above conditio

I have a reznor x125-3 lp furnace the looses the pilot flame when the setpoint is reached,or i lower the thermostat below the ambient setting.If I relit the pilot it stays lit until the above conditions change> is the gas valve shutting off ALL the gas when the setpoint/thermostat is lowered?

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  • 216 Answers

BAD THERMOCOUPLE , OR GAS VALVE. REPLACE BOLTH. ALSO CK CLICKSON HI LIMIT SWITCK, AND MAKE SURE BREETCHING IS NOT BLOCKED.

Posted on Nov 10, 2014

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6 Suggested Answers

6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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detox101
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SOURCE: Gas fireplace pilot flame won't stay lit.

Hi , you can try and pull the panel on the bottom of fireplace out and check the adapter in fireplace. Sometimes they go bad. When you open in also check to see if there is an adapter plugged in and a option to use the battery operated function. If this goes bad the pilot will not stay lit.

Posted on Jan 14, 2009

gear001
  • 59 Answers

SOURCE: HEIL FURNACE W/ WHITE-ROGERS GAS VALVE 36C84/410

The problem might be with your safety switches other than you gas valve poilte

Posted on Oct 12, 2009

billyvangogh
  • 108 Answers

SOURCE: reznor model# f125 pilot won't stay lit. i

Make sure the pilot is clean (Blue flame fully enveloping the top portion of the thermocouple) if its dirty the pilot will be yellow like a candle and barely touching the thermocouple ...quick fix is knock the pilot with a screwdriver...gently tapping it...knocking the dust out and getting a better pilot....the pilot could also be too small if its not making good contact with the thrermocouple....there could also be an Auxillary limit wired into the thermocouple which when open will prevent the magnet from staying closed....if all looks fine then the Gas Valve itself is likely gone (The magnet inside is not field repairable)

Posted on Oct 25, 2009

  • 75 Answers

SOURCE: pilot lites; but, as soon as I turn on gas flame

sounds like your thermacouplar is going out and needs replaced. Sometimes these will act like they are working fine , but when the pilot stays on for awhile and later goes out it is a sure sign that it is bad

Posted on Nov 08, 2009

heatman101
  • 43501 Answers

SOURCE: Coleman Gravity Floor Furnace need millivolt gas valve & pilot ki

Go to www.grainger.com and look for a "power pile generator" this is a millivolt thermocouple that may be just what you need to make your heater work again

Posted on Nov 12, 2009

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Williams wall heater 2509622. How do I keep the pilot on? It tends to turn off after it reaches the desired temperature.


WILLIAMS 2509622 OWNER'S MANUAL Pdf Download.

www.manualslib.com > Brands > Williams Manuals > Furnace > 2509622
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1 Answer

My pilot stays on on my propane furnace but will not light up


The Little Giant units use a Unitrol gas valve very similar to a water heater in the home. #1,urn the Unitrol gas valve to the "PILOT" position to ignite the pilot. Depress the plunger and hold it down then push the spark igniter button until you can see the pilot flame ignite.
You have a lit pilot so this is not a problem for you.
The pilot light stays on continuously by design.
Once the pilot flame is established, you then turn the on/off/pilot valve to the "ON" position and set the thermostat to the desired temperature range., it should then fire its main burner until the desired temperature is reached. Once the temperature is reached, the main burner will shut off and the heater will go into a standby mode with the pilot flame still burning.
If you have turned the pilot valve to on and set the temperature high, it should come on, if not a new gas valve is required, they can be very difficult to replace due to rust.and most cases require a new unit,

Mar 19, 2015 | Unitrol Propane Heater Valve - Little...

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My empire wall furnace does not ignite. It has gas flowing because the pilot is light, i have changed the thermostat and wired it two different ways in case I reversed them. What is next? Could it be the...


It could be several things: Is the Control Knob turned from Pilot to ON? If that is the case, wait a few minutes after turning it to ON. That will allow the Thermopile to heat up sufficiently. Be sure the flame is touching the Thermopile. If everything looks correct turn up your Thermostat to higher than the ambient room temperature and see if the burners light. Remember to turn your Wall Thermostat down to the lowest temperature setting before turning the knob from Pilot to ON.

FYI - That Wall Furnace does not have a Thermocouple. It uses a Thermopile instead to generate millivolts of electricity to open the gas valve and maintain the pilot flame.

If it is the Thermopile, you can order it directly from Empire Comfort Systems, as well as download your Owners Manual at www.empirecomfort.com

Feb 04, 2011 | Empire GWT-50 Wall Mounted Panel Heater

1 Answer

We have the white and rodgers thermostat model 1F81-261. The problem is that the ac unit will not work. We have reset and changed the batteries and set the point 4 degrees less than the actual room...


Set System Switch to Cool and lower setpoint below room temperature.
Verify thermostat and system wires are securely attached.
Diagonistic: Set System Switch to Cool and lower the setpoint below the room temperature. Within a few seconds the thermostat should make a soft click sound. This sound usually indicates the thermostat is operating properly. If the thermostat does not click, try the reset operation ( . If the thermostat does not click after being reset contact your heating and cooling service person or place of purchase for a replacement. If the thermostat clicks, contact the furnace manufacturer or a service person to verify the heating system is operating correctly.

Reset the thermostat by pressing , UP,DOWN and TIME at the same time.

Jun 28, 2010 | White Rodgers White-Rodgers 1F85RF-275...

1 Answer

Furnace cuts off before reaching set temp.


You can make sure it is not the thermostat by crossing or jumping the R and W terminals (or associated wires) together. This will keep the furnace calling for heat. As it is approaching set temperature, get in front of the furnace and inspect the air filter to make sure it is clean, watch the control module for any error codes that may be turning off the system prematurely.

On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).

Mar 07, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

The furnace shuts off before set temperture is reached


This could be normal. Some thermostats are designed with a heat anticipator. The anticipator takes into consideration heat that will remain within the system after the burners shut down, it anticipates the "left over" heat will be enough for the thermostat to reach it's setpoint. If it did not have this function the setpoint would be overshot.

If you are suggesting it shuts off well below the desired setpoint please clarify.

Dec 01, 2009 | Honeywell Electronic Programmable...

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Dometic RM 2800 Works great on AC but not on LP


Most likely cause is a blocked gas jet in the main burner its rare for the thermostat to be faulty but you cant dismiss it

Jul 27, 2009 | Dometic RM2652 Refrigerator

1 Answer

Nordyne LP Furnace wont fire


might be the flame sensor need replacing.

Apr 15, 2009 | Kitchen Appliances - Others

1 Answer

Lighting the pilot light


The steps involved can vary slightly depending on your furnace model and pilot valve type, so if possible try and find the instructions inside the furnace door cover or in the instruction manual. This is for a gas fired furnace, but applies to any gas-fueled appliance including water heater. Two of the most common types of pilot valve body assemblies either have a red reset button and a gas valve or no reset button and a valve knob that can be depressed. But whichever type you've got, if you have an older model furnace with a standing pilot (flame is lit all the time) then this is the basic procedure.
  • Turn you thermostat to 80 degrees or to a setting that will demand heat. Make sure the thermostat is in "Heat" mode.
  • Go to the furnace and find the pilot valve. The pilot valve body is a box shaped device into which the main gas line will run and is located near the gas burners. It will usually have a gas **** or valve knob that reads "On, "Pilot" and "Off." Locate this gas **** or knob.
  • Turn the knob or gas **** to the "Off" position and wait about 3 minutes for any residual gas to clear away.
  • Find the pilot. It's located near the gas burner tube assembly in the furnace.
  • Get your match or lighter ready. Sometimes the pilot is hard to reach. If possible, try and use a long fireplace match when you light it. If you don't have a fireplace match then a butane BBQ grill lighter works well too. If you don't have that, then you can fasten a match to the end of a stick when you light the pilot
  • If you have a pilot with a red Reset button, turn the gas valve from "Off," to "Pilot."
  • If you have a pilot with no red button, turn the knob from "Off" to "Pilot."
  • Place the lit match or ignited lighter tip at the pilot and depress and hold the button or depress the knob as appropriate. Depress the button or knob for about 30 seconds. This maintains gas flow to the pilot until the thermocouple gets hot enough to open the main gas valve.
  • Once the pilot stays lit, slowly release the button or knob and turn the gas **** or knob from the "Pilot" position to the "On" position. This will ignite the burners and keep the flow of gas supplied as required for the burners as called for by the thermostat.
  • If the burners fail to ignite then it may be because the thermocouple did not get hot enough to open the gas valve. Wait a few minutes and then repeat the above procedure. This time hold the red reset button or depress the knob for about 45-60 seconds.
  • Once the main furnace burners ignite, adjust the thermostat to the desired setting.
  • If you've followed the previous steps on lighting the pilot and it still does not light after, or will not stay lit, then you probably have a problem with the thermocouple or an adjustment needs to be made to the pilot. You'll need a furnace service technician to replace or repair these parts. You may find that the pilot lights, but it is an anemic looking flame. That's a different problem we'll look at in the next section.
  • If the pilot lights but the flame is a weak yellow flame, it will not get hot enough to heat the thermocouple to its set point allowing the gas valve to open.
    A natural gas flame should be a bright blue with the tip of the flame having just a tinge of yellow. A propane flame should have a bluish green flame with a tinge of yellow at the tip. The flame should be strong enough to hit the thermocouple tip about 1/2 inch from the tip end. If the flame is weak or shaky looking, check to see that a breeze or draft is not blowing on it. Adjusting the Flame
    There is usually a small screw on the pilot valve body that will adjust the flame. You may have to refer to the manufacturer's instructions to find the screw. Turn the screw as needed to adjust the flame throw. Yellow Flame
    A yellow flame is caused by lack of air and incomplete combustion. It can be caused by a dirty pilot tube tip. Split Flame
    This is caused by dirt in the pilot tube. Take a needle or small nail and gently clean the tube. Flickering or Wavering Flame
    A flame that flickers is usually caused by a draft.
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Feb 18, 2009 | Water Heaters

1 Answer

Temp shows 2 degrees warmer than what is was set to


sometimes the furnace does a better job than anticipated, i wouldn't worry about it, especially if the furnace shuts off.
the setpoint is the temperature you want it to be
cycle lenghts are determined by how much recovery you are requesting. for instance, in the morning when you wake up, you want the temperature to be at its setpoint. what the thermostat will do is make the furnace run a limited lengths during the recovery process.

Nov 11, 2008 | Honeywell Programmable Thermostat Heater

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