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heater problem, brrrrrr 700 86

posted by  someone claiming to be Alan on  Sat Nov 11 03:24 CST 2000 [RELATED]

1986,760 turbo....w/climate control....slide the lever to the defrost symbol, nice flow from fan....NO OTHER symbol produces fan, thus, no heat..brrrrrr....checked fuses..ok..where to now?







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    Re: heater problem, brrrrrr 700 86

    posted by  someone claiming to be jim on  Sat Nov 11 04:30 CST 2000 [RELATED]

    There is a temp sensor in the heater hose running from the engine to the firewall. It does not allow the fan to come on until the engine is warm, in any position other than defrost. Either the wire will be disconnected, the switch will be bad, or the ground wire from the sensor to body will be off. If it is the switch, you can bypass it by grounding the wire, which will allow the fan to run at any time.







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      Re: heater problem, brrrrrr 700 86

      posted by  someone claiming to be Don Blaney on  Wed Nov 15 14:26 CST 2000 [RELATED]

      I have an 87 760 turbo and had the same problem. The mechanic discinnected and bypassed a compression cylinder that had a leak and *shazam* HEAT! Pretty timely in mid November.

      -Don







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    Re: heater problem, brrrrrr 700 86

    posted by  someone claiming to be Charles on  Sat Nov 11 04:06 CST 2000 [RELATED]

    Alan,

    I have an '88 760. Does your '85 have any diagnostic codes?

    In any case, check the connections to the ACC. With the engine OFF, unplug and plug in the control unit a couple times. I bet it hasn't been touched for the past 14 years and a connection may be a bit corroded. Be gentle, it is an expensive item to replace (but you already know that, don't you?).

    The Volvo green manual, TP 8701201, is about $45. Like the OEM wiring diagram for everybody, the Climate Control manual will pay for itself many times over for ACC equipped cars the first repair you can do instead of paying for a Volvo tech.

    I have to be away from home for a few days, but if you get no relief, e-mail me and I'll try and find more info from my copy after next Wednesday.






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