Coleman Gravity Floor Furnace need millivolt gas valve & pilot ki
Looking for millivolt gas valve and a millivolt pilot assembly kit for a Coleman Gravity Floor furnace (natural gas). Unit is about 50 years old. Model #2004D. Serial# 16912896. 856 series. 65,000 btu/hr input; 45,500 btu/hr output. Pilot will not stay lit. Coleman quit making unit in the 70's. Trying to see if there are other manufacturer's that make millivolt parts that will be compatible with my unit. Thanks.
Optional Information: Make : Coleman Model : 2004D
Already Tried: Pilot light will not stay lit. Looking for part.
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If it is a 'standing pilot' furnace and it just 'went out'...I would think you need to try to re light the pilot light. If it doesn't re-light, it is probably time for new thermocouple. Presidentials are very tricky to install a thermocouple on if you are not experienced with it or if you don't feel comfortable working with gas and electricity.
Probably should call a local 'handy-man' at the least to perform the task or a local HVAC service company.
There should be a series of phillips head screws around the perimeter of a large access panel on the front of the furnace. You'll need a 3/8" wrench for the thermocouple connection to the gas valve and a 7/16" wrench to remove the 'pilot' line off of the gas control. Look for how the pilot assembly mounts under the pancake style burner because its much easier to remove the whole pilot assembly to replace the thermocouple than just it by itself. Once removed, it is self-explanatory as to replacement of the thermocouple.
Do NOT overtighten the thermocouple connection into the gas valve as you can damage the gas valve by doing so. Make sure you leak test the pilot tube connection after it is reconnected to the gas valve. A diluted solution of dishwashing liquid dashed around the ferrule of the pilot line should show bubbles if there is a leak. No gas will be in that line unless the pilot button is depressed and/or the pilot light is lit and burning.
There is really not enough information here to go on. If this furnace has a thermocoupling, the pilot will need to be lit manually. Follow the manufacturers lighting instructions carefully. If it still will not light you may have a dirty pilot assembly or a defective gas valve. Modern furnaces do not use a thermocoupling. There is no standing pilot light. Each time the furnace needs to be lit it will be done electronically. Many reasons why it wont light in this case. Safety control could be preventing it from lighting for safety reasons. A bad ignitor, ignition module, circuit board, gas valve, pressure switch, gas supply, induced draft motor, blocked or restricted flue pipe, cracked heat exchanger, dirty flame sensor, ect. ect. ect.
Did you clean the pilot orfice?? It has a very small opening about the size of a hair. You may have to use a needle to open the opening....Are you getting gas to the pilot orfice assembly from the Gas Valve when you set it to Pilot?? If not then check the pilot adjustment screw on top of the gas valve at the pilot tube. CW decreases flow.
The pilot assembly may need cleaned out and the orifice cleaned, also the gas valve may need to be replaced, to check for proper voltage from the thermocouple you need a flame source and it takes a meter that can register DC milliamps, and should be 350 to 750 millivolts. Heat the thermocouple with the pilot or other flame source and check, if OK, gas valve is weak.
Marty, I would really like to help you, but the DESA/Comfort Glow Model Number you listed is incorrect. Please check & confirm it and get back to me.
To visually tell if your gas control valve is Millivolt or not. First, look at the pilot assembly. If it has a thermopile attached to the top of the pilot, it's millivolt controlled. If you are currently using a wall switch to turn the burner ON, it's millivolt controlled. If the control valve has 3-electrical terminals on the side of it, it's millivolt controlled.
As far as selling you a remote control kit is concerned, we at FixYa do not sell any products of any type. But, you can buy them from a hearth store in your area or online. I would recommend looking for a SkyTech Remote Control Kit, as they are one of, if not the best on the market. Plus, they come in a a host of models depending on what you want the remote control to do.
Hope this helps you and thanks for choosing FixYa.
First, you need to know how many millivolts the Thermopile (aka Pilot Generator) on the the furnace's pilot assembly millvolt terminal. Then you find a wired digital thermostat, that meets the same millivoltage that the Thermopile Generates or has a lower requirement. You have to run millivolt wiring from the furnace's pilot assembly millivolt terminal block (the wiring should be connect to the TH & the TPH terminals, to where you want to place the digital wall thermostat. In most cases, it can not be more that 15' away from the furnace. In other words, no more than 15' of wiring can be involved.
I would first check to see if pilot flame is burning clean and strong enough.It should have about 1&1/2 inch flame with slight yellow on tip. Most of flame should be bright blue. It's possible that pilot orifice and/or gas feed tube are dirty. If you feel comfortable with doing this it may help.Sometimes they can be hard to get to but the main thing I would caution you on is if you disconnect pilot gas line to be very careful when you are threading fitting back into gas valve. Fitting is brass and gas valve is aluminium so its easy to cross thread and cause leaks. Also if this is a millivolt system it will have what is called a basso and if its bad it can cause this problem.Normally if it's a millivolt system there will be no outside source of power, no blower or fan.Hope this helps you. Thanks
It sounds like the gas valve is dropping out. Make sure the system is venting the exhaust(no restrictions). Then make sure all your wiring connections in the unit are tight. In a millivolt system if all wiring connections aren't tight and clean your circuit will drop in millivolts and the gas valve will drop out. The gas valve requires a certain millivolt to stay open. I hope I was of some assistance!! Good luck!!