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Adjusting honeywell 24v gas pilot vavle - Honeywell Air Conditioners

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Need this part hard to find gas vavle made by honeywell
part#VR8205M2823

Posted on Oct 20, 2009

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Honeywell thermostat th4000


Hard wiring on newer t-stats calls for a jumper from R to Rh. If that doesn't work, or isn't the problem then check for 24V at the unit board from W to common. If you have 24V there the stat isn't the problem. I don't know if your heater is gas or electrical, so there's not much else to say.

Jan 04, 2014 | Air Conditioners

1 Answer

My heil furnance comes on but no hot air or air at all


see this causes and fix it. God bless you
o light the pilot on a standing-pilot (always on) ignition system, follow the lighting instructions located near the control. Otherwise, try these steps: Light the pilot:
  1. gasfurnace1.jpg Press and hold the pilot control knob to start the pilot. Set the control knob to the pilot position. Hold a long match under the pilot gas port.
  2. Press the control knob; the pilot should light. Hold the control knob down until the flame is burning brightly (about 30 seconds). Release pressure on the knob, and turn it to the on position.
  3. If the pilot goes out when you release the control knob, try relighting, holding the control knob down longer. If the pilot again goes out, check the thermocouple (below).
Adjust the pilot:
  1. Remove any cap covering the pilot adjusting screw on a combination control.
  2. Turn the adjusting screw counterclockwise to increase the flame or clockwise to decrease it. It is correctly adjusted when the flame envelops the thermocouple bulb by 1/2 inch and appears dark blue with a small yellow tip.
Test and replace a thermocouple:
  1. Hold the control knob to pilot and light the pilot as above.
  2. Unscrew the thermocouple fitting with an open-ended wrench.
  3. Set a multimeter to the DVC (lowest voltage) scale.
  4. Clip one multimeter lead to the end of the thermocouple tube nearest the pilot and the other lead to the fitting on the other end of the tube.
  5. If the multimeter shows a reading besides zero, the thermocouple is functioning. Replace the thermocouple tube.
  6. If there is no reading, you will need to clean or replace the thermocouple following steps 7 through 11.
  7. Release the control knob and shut off the main gas valve on the gas-supply pipe that leads into the burner. Shut off power to the burner at the electrical service panel .
  8. Remove the thermocouple from its mounting bracket.
  9. Wipe the combination control clean and install a new thermocouple, tightening it by hand, then give it a one-quarter turn with a wrench.
  10. Insert the thermocouple into the pilot bracket, being careful to not crimp the tubing.
  11. Turn on power to the furnace and relight the pilot (above).
Adjust an adjustable burner air shutter:
  1. Set the thermostat to its highest setting to keep the burner running. Once the furnace has heated up, remove the burner access panel and loosen the locking screw.
  2. Open the shutter by turning it to the right until the blue base of the flame appears to lift slightly from the burner port surface. Then close the shutter until the flame reseats itself on the surface.
Clean removable burner tubes and ports:
  1. Shut off gas and power to the furnace.
  2. Unscrew or loosen and remove the tubes from the supporting bracket.
  3. Carefully clean the tubes with a brush or vacuum, making sure not to damage the burner ports.
  4. Use a stiff wire to clear any debris from clogged ports.

Oct 08, 2012 | Honeywell Icp Heil Tempstar Furnace Spark...

1 Answer

Pilot light will light and no main gas, if I by pass the control unit and go from the 24v to the pilot light coil both will fire


the thermocouple is bad replace it it is the little rod that the pilot light heats as it burns to tell the unit it is on

Oct 06, 2009 | Ruud Air Conditioners

1 Answer

Furnace runs about 1 minute, then total shutdown


What type of gas supply line do you have? Is it black pipe or copper? If it is copper, there can be a film like substance that builds up on the inside of the copper. The debris will the get caught in a pre screen where the supply enters the valve thus cutting the supply of gas to the unit. Also, the thermocouple may be bad. You didn't say that you replaced it. Try replacing it as well. Also, you could have a limit switch turning the system off and thus cutting the gas off completely but it is highly unusual for the pilot to be cut off as well unless the pilot is being blown out when the gas is shut off. Also, turn the unit to fan only without calling for heat. Using a flame of some sort, put it into each baffle of the heat exchanger. If your flame is being blown around in one of the baffles, then you have a hole in the heat exchanger and what is happening is that the roll out switch is cutting the unit off and the air still moving through the heat exchanger is blowing the pilot out. I have seen this actually happen. If your furnace is in excess of 15 years old, it does need to be checked for possible holes. If it is in excess of 25 years old, it is a huge possibility that the unit has already developed a hole. If you feel hair coming out of one of the baffles, then shut the unit down immediately and have it replaced!

Apr 05, 2009 | Air Conditioners

1 Answer

Honeywell gas valve will not hold pilot light supply. I see inside what seems to be a permanent magnet with a spring loaded keep plate. but how does the resistance of the thermocouple affect this?


The resistance of the thermocouple proves that there is flame present at the pilot it is a safty so that unburned fuel deposits do not occur. If your safty valve is magnetic I dont understand your question.

Nov 09, 2008 | Honeywell Air Conditioners

1 Answer

My Honeywell gas furnace won't fire up. The pilot is working , the fan will turn on if set to manual, but won't fire. I live in Canada and am freezing. thanks.


is this a power vented system if so check the ventr motor . it must run first alowing the gravity swtch to make and send 24v to the gas valve- if its not a vented unit sounds likely you have a main valy or posibly a mercury or thermo couple problem. hope this helps.

Oct 07, 2008 | Air Conditioners

2 Answers

I have a dayton furnace with a honeywell vr8440p-2088 gas control. The ignition works fine but the problem is I am getting no gas it seems to light the pilot. I checked the orifices at the end of the pilot...


I had the same problem with the same honeywell vr8440p2088 gas controler.  I found out the nob to turn on the pilot was broken.  If you can pull the knob off it is broken.  The knob has two small teeth on it to keep the pilot and gas open.  good look finding a replacment knob as the part is not made anymore.  But there is a relacement part for it.  it just costs about 250.00.  

Apr 18, 2008 | Honeywell Air Conditioners

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