Chrysler Air Temp Model #4312-30

[quardt5]

Chrysler Air Temp Model #4312-30

Need Parts Help?

[MrFixit246]

Ummm, we need your help first. A little more information would be helpful in answering your question.

1. What parts are you needing, many of the old furnaces used more universal parts. I.E. thermocouples, gas valves, blower motors

2. What part of the country do you live in. There are some places in the larger cities that may have harder to find parts for an older furnace.

3. I'm sure there is a 3rd question but I just got done with a 16 hour shift and I can't think of it.

MrFixit

[quardt5]

There is a small tube that comes off of the gas valve main pipe that travels down and ignites by the pilot light and then starts each of the three burners. That small tube has coroded on me I need to replace it.

In a south suburb of Chicago

[dkpd1581]

That tube you are describing sounds like an aluminum pilot tube and is a generic type part.  If it is in fact the pilot tube that feeds gas to your pilot you have two options:

1. Find any local HVAC supply house around and get a package of the tubing and replace what you have or find an internet supply house - looking under aluminum pilot tubing..

2. Spend a few dollars on some JB Weld from Walmart, Home Cheapo, Lowes, whoever; mix it and hold the corroded tube with the hole down and apply the JB Weld mix.  The upside down position of the corroded hole keeps the material from going into the tube and sealing/obstructing the tubing.  Make a ring of JB Weld around the tubing (being a little generous on either side of the hole).  Let the patch cure according to instructions and start your system back up.  Pilot tubing holds a miniscule amount of pressure and heat from the furnace should be no problem.

[Cactus Bob]

i would love a photo of the gas valve with an arrow pointing to the place where the tube attaches to the valve . the reason is that a lot of those furnances had two tubes  the 1/4 inch aluminum tube is the one that provides the gas for the pilot . the 1/64 inch steel tube connects to the gas valve regulator and is a vent for the valve and no gas will go through it unless the valve is bad , today the vent is just a loose fitting cap on the gas valve and no tube is used ............. witch tube is bad ?

[quardt5]

The tube does not attach to the valve it attaches to the main pipe coming from the gas valve to the three burners. It is 1/4 inch but not aluminum it is stainless. The corrosion came from a steel bracket being spot welded to the stainless tube.  The tube has a entire row of cuts in it for the gas to come out and hit the pilot light and start the three burners.

[dkpd1581]

Ok ... I dont know the official name of that piece (others here can help out on that one) but it is basically a pilot ribbon burner...the flame runs down the length of and parallel to the manifold and starts up each burner.

Fedders bought out Chrysler Airtemp in the 70's so I would assume that your furnace is at least 20+ YOA - most likely closer to 30.  I would bet that the corrosion was from moisture condensing in the pilot ribbon burner and the lowest spot was where the weld happened to be - just a theory.

What is the serial of your unit...it should give an indication of the year make.  In all honesty if your furnace is 20+ YOA, you might really consider replacing the furnace with a higher efficiency. 

It is a very real possibility that no replacement part is available:?.

Best of luck.

[Cactus Bob]

WOW!  i remember those ! but i can only think of a few and the last time i saw one was in the early 80s ..... i dont think it was common at least not here in arizona   ALL if these furnances have gone to heater heaven as far as i know ....... and i have to say that is good for the most part . a new furnance will never last as long as this one did but will save its own cost in gas in no time ....good luck

[Hot15Challenger]

Hey Cactus Bob. I realize I am posting a reply to a very old thread, but just came across it today while looking for some tips for my Chrysler Airtemp furnace that is STILL RUNNING AND STILL WORKING LIKE BRAND NEW thank you very much. I was on this site looking to see how I can shorten the time the blower runs after the burners shut off. The dial and temp settings are very sensitive and I've been messing with it for a couple days now. But my main concern is letting you know that my Chrylser furnace, at 43 years old is exactly as efficient as a brand new furnace in a brand new house. I have done some comparisons with my boyfriends brand new house/furnace, and our gas bills every month are consistently the same (yes, same square footage on the houses as well). In 6 years I have had to spend only $200 on it (not counting filters) for a couple parts that wore out. I highly doubt a new furnace would be that cheap to fix.