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05 /20/ 26, 12:24am

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Subject: Re: LP Furnace Author: Jim Scoggins [ Next Thread | Previous Thread | Next Message | Previous Message ] Date Posted: 11/ 17/ 01, 4:32am In reply to: Elmer Aydelotte 's message, "LP Furnace" on 11/ 16/ 01, 7:03pm it's odd that all three don't work double check the basics be sure the LP switch on the dash is turned on turn on the thermostats and set the heat fairly high you may have to cycle them 4-5 times before they will work [ Next Thread | Previous Thread | Next Message | Previous Message ]

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[> Subject: Re: LP Furnace Author: Bob Dilks [ Edit | View ] Date Posted: 11/ 17/ 01, 7:07am You have to find the other thermostat wire.or improvise. Suburban supplied four wires out of the insulated furnance controls as follows: red positive power supply, yellow negative ground and two blue wires for thermostat use. Blue Bird supplied wires to the furnance as follows: red positive power supply, yellow negative ground, red from the thermostat to one blue wire to carry the thermostat signal and one brown connected to the other blue wire to ground the thermostat signal. If you improvise and ground the free blue wire exiting from the furnance, the furnance should operate normally in response to the opening and closing of the thermostat. Blue Bird wired the thermostats as follows: black power supply positive to the upper right hand connector (as viewed from the front) and red power supply positive from the lower left hand connector to one of the furnance blue thermostat wires. Its hard to believe that the negative thermostat ground wires were omitted to all three furnances as coincidence. The wires supplied by Blue Bird were covered in a braded sheath and wrapped at the sheath end with black electrical tape. Unwrap the tape and check in the sheath for the missing wire. Please do not rely on the wire color coding shown above as assembly line workers often expressed their individualism. Call me at 580/564-3517 if you need more info. Bob Dilks [ Post a Reply to This Message ]