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Heater fan only works on 4

Jase69
Jase69
in Ford Fusion Club

Featured Replies

Hi there,

can anyone suggest why my heater fan only works on No.4? I've had a look but can't see anything obvious.

many thanks.

Jase. (Fusion 2 53 Plate)

  • Quote


    Heater blower resistor. Common fault really on older cars really.

  • Quote
    • Like 1

    yes it will be your  heater resistor not to hard to replace try YouTube or google                              

  • Quote
    • Author

    Thanks guys. I'll have a look. I was hoping it might be a cheap n cheerful fix.

  • Quote

    On my Mk1 focus this blew twice in a short period of time. The resistors didn't blow but the thermal fuse which is part of the resistor pack blew both time. Both times I soldered a new thermal fuse onto it (you can but them separately on ebay - they are used on various other things like hair straighteners).

    After the 2nd blow I investigated it further and found the cause was stiff bearings in the heater fan which was overloading the resistor pack, causing the resistor to get hot and blow the thermal fuse. Cleaned up and oiled (lightly) the motor bearings and all was fine after that.

    So simply replacing the resistor pack might work but it might be short lived if there is something else causing it.

  • Quote

    https://www.ebay.co.uk/itm/Heater-Blower-Motor-Fan-Resistor-Fit-Ford-Focus-C-Max-Fiesta-MK6-Fusion-1325972/173754701783?epid=28022890501&hash=item28749657d7:g:FK0AAOSwtaBcRtN7:rk:3:pf:1&frcectupt=true

     

    the thermal fuse is at the top of the picture between the two prongs

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    The "Digestive"

    • The Digestive Forum Roundup (24th May - 31st May 2026)

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      The Digestive Forum Roundup (24th May - 31st May 2026) We hope this email finds you well and enjoying your week. As always, our forum has been buzzing with activity, so we’ve compiled the highlights for you. Plenty of interesting discussions are taking place, especially around the Ford Focus and Fiesta models. Starting off with the Focus, many members have been discussing issues with the Emergency Call System, particularly in the Mk4 model. PLB raised concerns about persistent malfunctions, a se
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