Heater Blower only working on speed 4

[stubbsys@hotmail.com]

Hi all ive a 06 plate transit connect ive seen on other forums that replacing the resistor normally fixes the fan but ive tried this without success is there anything else i could try please help

[gt_addict]

If the resistor works for a moment then stops and you go back to only working on level 4 then its more than likely the motor itself causing the resistor pack to blow. I had the same issue on a mates focus.

[liteace]

Hi all ive a 06 plate transit connect ive seen on other forums that replacing the resistor normally fixes the fan but ive tried this without success is there anything else i could try please help

The fan motor is fed with a constant +12volt feed when the ignition is on, speed 4 is direct switch to earth, speed 1,2 & 3 run through the resistor then are also switched to earth, inside the main resistor unit there are 3 resistors connected in series, speed 1 run through all 3 resistors, speed 2 runs through 2 resistors and speed 3 runs through 1 resistor then down to earth. Earth pins 1,3 & 5 ONE AT A TIME of the fan blower switch and see if the blower works on the lower speeds, if it does replace the switch

[electric]

Check the plug that goes to the resistor they have a habbit of over heating, ford supply a replacement plug if it is burnt

[g-man]

The fan motor is fed with a constant +12volt feed when the ignition is on, speed 4 is direct switch to earth, speed 1,2 & 3 run through the resistor then are also switched to earth, inside the main resistor unit there are 3 resistors connected in series, speed 1 run through all 3 resistors, speed 2 runs through 2 resistors and speed 3 runs through 1 resistor then down to earth. Earth pins 1,3 & 5 ONE AT A TIME of the fan blower switch and see if the blower works on the lower speeds, if it does replace the switch

you learn something new everyday

[stubbsys@hotmail.com]

Thanks all i will have a look over the weekend see what i can see and let you all know