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MrFixit246

Member Since 01 Sep 2008
Offline Last Active Nov 02 2013 09:17 PM

Posts I've Made

In Topic: Lennox G1203-110 antique

09 January 2011 - 11:30 PM

Sorry I am late to the party here. I guess i have been asleep at the wheel. Too much Overtime.

These furnaces are solid, if they don't crack along the compound curve in the back of the heat exchanger. I have yet to see a G12 cracked that is making CO because of the crack.

The yellow flame you saw first was probably dust from the cleaning. It can take 5 minutes to clear up and longer if you washed the burners.

As far as adding a roll out switch, I would not try to re-engineer the furnace, it only adds liability to you and usually makes the furnace break easier. K.I.S.S.

Finally the gas valve is a slow open slow close valve. There is an orifice on the regulator that causes it to be this way. If you ever have replaced one with a snap open valve you will usually get a delayed ignition type whoomp on start up.

'Fixit

In Topic: Comfortmaker/Snyder General Gas Furnace - No Heat

22 December 2008 - 11:18 AM

Jeff,

I have done the exact thing you have. Thankfully mine only fried the t-stat. I would replace the t-stat and test the unit. You will be able to see rather quickly if it only did the thermostat.

MrFixit

In Topic: RHEEM RGDG-05EAUER gas furnace

18 November 2008 - 12:02 PM

Please do not ASS-U-ME the roll out switch tripped erroneously. There is a reason they are there. One of the possibilities is the heat exchanger could be cracked. When this happens the flame will roll back a little and cause the roll out switch to overheat. I think this is what the other person was referring to when he said serious situation is possible.

In the great white north I have seen many cracked heat exchangers and even saw a family pulled out of a house on stretchers because of it. DO NOT by pass them or ignore them.

If you are certain that is not the problem a couple more things to check are the ignitor, check resistance. The induced draft motor will run a while then shut off and lock out if the burners do not ignite. Do you hear the gas valve click and gas go to burners for about 8 seconds? If so you are looking at an ignitor.

BTW you normally won't see the cracks in the Heat Exchanger unless you pull the heat exchanger out or use a boroscope and run it up into the heat exchanger.

MrFixit

In Topic: Maytag Gas Dryer LDG4914AAE

14 November 2008 - 01:43 AM

Another idea is to put in one of those access doors so the next time it gets clogged you can get in there and clear it out. I have seen those where people need to get at water valves or duct work in the ceiling.

 

mrfixit

In Topic: Maytag Gas Dryer LDG4914AAE

10 November 2008 - 10:59 AM

Also, when the dryer turns off, is there a rumbling sound that continues for a second or two? I have found the blower wheel stripped out on these quite a few times.

If all else is clear the blower wheel being stripped will not push enough air through causing overheating.

MrFixit


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