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Old 11-29-2006, 08:18 PM   #16
Join Date: Nov 2006
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I'm not sure if it has the valve your speaking of, i know it is original to the unit. The numbers on the valve are 8342-3
model# 646ax
p/n 301273-703
I hope this what you asked for(they are kinda smudged and hard to read), if not I will try again. Is installing a gas valve complicated ?
Thank you for all of your help, I really do appreciate it.


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Old 11-29-2006, 08:28 PM   #17
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Hi somany?'s

Installing the gas valve is slightly labor intensive. You will need a 7/16" open end wrench, two descent pipe wrenches, nothing less than a twelve inch pipe wrench. Some teflon pipe dope and possibly a 5/16" nut driver. Shut the power and the gas off to the furnace. Be extremly careful not to break anything, outside of what I have listed there really not all that hard. The replacement valve will not look the same or wire the same as the original. You will have to follow the wiring diagram to a tee. You have made it this far, but if you don't feel comfortable with doing it call in the pro's. Let me know if I can help further.



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