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Strange fan operation and code 26

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Hello, all running well on my1989 turbo SE until on a nice run today heater fans stopped working (the heater gives out no heat anyway due to stuck heater valve that is on the to do list) and engine warning light came on. Left it to cool for a while then started to loop out the acdl socket. For no particular reason, I turned the heater fan switch off and the cooling fans came on.  If I turn the heater fan switch on, the cooling fans go off. (ignition on only, engine not running). Does this make any sense to anyone.. The fault code is 26.

Many thanks Alan 

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I had a heater fan motor that seized, the old grease was too stiff. In my case it was blowing the fuse. Maybe in your case it's too much of a draw for the circuit?

I removed the heater fan (easy) and cleaned and re-greased it, and it was fine after that.


Vulcan Grey 89SE


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