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Old 11-04-2009, 10:25 PM   #1
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Please Help! Gas Heating Lockout!


Thanks for the help with the "strange problem with my furnace".

I followed Plumer101's instruction and found out the service code, which is 21 - Gas Heating Lockout. Control will NOT auto reset. Check for : Stuck gas valve relay on control or miswire to gas valve circuit.

I then followed Houston204's instruction and checked the ground wire. It seems connected.

Can anyone help me with this? It is getting cold here at Atlanta. Is it possible to fix this problem by myself? Should I call a technician to come in and fix it?

Thanks a lot!

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Old 11-05-2009, 12:38 AM   #2
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Please Help! Gas Heating Lockout!


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Originally Posted by chenjijc View Post
Thanks for the help with the "strange problem with my furnace".

I followed Plumer101's instruction and found out the service code, which is 21 - Gas Heating Lockout. Control will NOT auto reset. Check for : Stuck gas valve relay on control or miswire to gas valve circuit.

I then followed Houston204's instruction and checked the ground wire. It seems connected.

Can anyone help me with this? It is getting cold here at Atlanta. Is it possible to fix this problem by myself? Should I call a technician to come in and fix it?

Thanks a lot!
this is past a diy prob . u need a tech with meters and diagnostic skills , dont be fooling around with the relays or jumpering stuff , be safe........Jack

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