Question about GE AJCH10ACB Built-In Room Air Cool Unit

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Gas furnace How much propane pressure is needed to run a oil/gas furnace burner?

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Re: Gas furnace


And correct You can addapt SOME burners to LP. Check with MFG to be sure. SOme Burners are dedicated to 1 fuel only IE LP only or NG only.

The LP has no regulator needed at the appliance it is regulated at the tank regulator, or on some 2 stage systems at the inlet to the building.

11" - 13" water column is the range for LP

If you cant find any MFG to answer your question take the name off the GAS valve you use and any model number on the gas valve and attempt to inquire form those numbers as to availability of lp change over. IF YOU DONT FIND ANY MFG OR INSTRUCTION MY ADVISE IS EITHER REPLACE THE VALVE WITH ONE THAT YOU KNOW IS APPROVED. A safety warning here is worth all the money because you cant save enough on the price of a new heater to replace any body and very few houses. Keep in mind that the spuds or orfices have to be changed also and some burners require reset of the Combustion Air inlet.

Posted on Mar 02, 2009

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Re: Gas furnace

11" of water colum on Propane (roughly 1/2 pound). Oil runs on 100 PSI.

Posted on Dec 13, 2007

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LIght on box inside flashes 4 times on a new propane fill up

If the gas was empty for three days, the furnace may have attempted to start numerous times causing virtually ALL residual gas in the incoming line to be drawn out. You may consider purging the gas line at the clean out cap where the gas line enters the furnace. However, it should have restarted and stayed running after just a few times at the most because as long as the line was NOT disconnected from the main tank, there should be NO air inside the line to cause flame failure.

I'd suggest asking the service company to double check the furnace manifold pressure to ensure there is not a regulator related problem.

Three times this winter (on the coldest days no less) a tiny droplet of water froze internally of the regulator right on the orifice blocking gas flow.

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My Ruud furnace sometimes will blow up the exust vent when lighting

If the burners are inshot burners (look like little jets), Shut the furnace and gas off. Take a 5/16 nutdriver and remove the four screws that hold the gas manifold and the gas orifice's. This should pull back, and each of the inshot burners will also have the same size per burner. Remove each burner individually and look @ the front of the burners where the "wings" are. With a flat head screwdriver, slightly open the wings which act as flame runners. This will allow the gas to run across evenly so the flame will hit each burner and not build up gas and blow like you are experiencing. Reassemble and run test with gas & power on. Good luck

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Ruud 90+ Model UGRA 10EZAJS Trips Out

Check for condensation buildup in the Induction Blower housing. The condensate tubes or canister may be blocked and causing the diaphragm switch to trip the unit out causing the burners to shut down.

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I have a slight propane smell in the house, but the furnace is still running. Upon inspection no leaks are detected, but the bottom flame on the burner does not seem to be in trim. Could rust or an...

The simple answer to your question regarding the inefficient burner is Yes. Also, be sure you're not running out of gas. That can also cause the odor. Also, a partial blockage in the furnace's exhaust vent piping can cause it.

Hope this helps you track it down. At the same time, unless you're a certified gas technician, don't undertake something you're not familiar with, as far as making a repair is concerned.

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Having problems with Carrier 58RAV furnace. Goes through the motions, but gas never turns on. I think it is a problem with the LPGS. Please advise. Thanks

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).

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1 Answer

What do I need to do to covert from propane to natural gas on 100,000 BTU furnace ? It is a weather king md.80PJ10ECR01

Take your Model and serial number to an HVAC parts house and they will get a kit for you that switches over from propane to natural gas. The spring in the valve is different and the orifices are different. Propane runs about 10 to, 11 inches of water where natural gas is about 2.5 to three. So if you did not change the springs and orifices you will cause the furnace to over heat and posibly catch on fire. These kits are easy to change the orifices just unscrew. The top of the gas valve has cover over the spring and an ajustment screw inside just remove that and pull out old spring and insert new one. Be careful with the springs they are very tiny and not much thicker than human hair. You really need to get someone to set the pressure for you. Feedback welcome Rus

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Sounds as the regulator is not operating correctly (possibly the control board)

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Weak flame in intertherm furnace

Ok, so we can rule out the ignitor. (standing pilot systems can develop problems that will cause such symptoms.)

Check the gas pressure, make sure you are getting 11 to 14 PSI.

You need that after the regulator all the way to the manifold.

Also check for cracks in the heat exchanger, causing the wind from the blower to distort the flame pattern enough to cause improper contact with the flame sensor.

Make sure the burners and flame channels are clean of rust, and dibri build up, allowing the flame to properly contact the sensors.

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1 Answer

I want to be prepared to change my Carrier Furnace from Natural Gas to Propane if I need to.. I was told that their should be a little sack with a replacement jet hanging there somewhere. There is not.. ...

not only do you need the will need the spring changed in the gas valve and a manometer to set the proper gas pressure output from the valve.If you change the jets only you could do alot of damage to your furnace.

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