I have a 2007 fiesta and the heater fan only works on setting 4. I’ve read a few reports of the issue being related to an actuator. I’ve identified a heater flap actuator on the drivers side and wonder if that’s the part I should replace?

comments appreciated

cheers 

If only works on high speed it’s usually the resistor pack. Might just be the thermal fuse that is built into the resistor pack. For testing you could jump the fuse with some wire. Never reinstall with thermal fuse bypassed as you could end up with a fire. Thermal fuse failure can be caused by stiff bearings in fan motor, causing extra electrical load

Thanks for your feedback. Would you be able to tell me if the item below is what you refer to as the resistor pack? It’s the same item I have in my car in the drivers side footwell
https://www.ebay.co.uk/p/Ford-Fiesta-Mk6-Heater-Flap-Motor-Actuator-1S7H19B634CA/1009815443

cheers

8 minutes ago, Munro999 said:

Thanks for your feedback. Would you be able to tell me if the item below is what you refer to as the resistor pack? It’s the same item I have in my car in the drivers side footwell
https://www.ebay.co.uk/p/Ford-Fiesta-Mk6-Heater-Flap-Motor-Actuator-1S7H19B634CA/1009815443

cheers

Erm no thats not it.

 

Here:

https://www.ebay.co.uk/itm/HEATER-BLOWER-FAN-MOTOR-RESISTOR-FOR-FORD-FOCUS-FIESTA-MK5-MK6-FUSION-1325972/273949099534?fits=Car+Make%3AFord&epid=11006776627&hash=item3fc8a3860e:g:gSgAAOSw61hac~tC

Thanks for the link. Here’s my issue - putting stupidity to one side. I bought that item a few weeks back thinking that’s what I needed but I couldn’t find the item in either footwell. 
 

I watched a YouTube clip advising on fitting it but I don’t seem to have one.

confused? I am 

I don't know where it is on your car.  To explain further (assuming you find it). The silver bit between the two prongs on the right hand side of pic on ebay listing is the thermal fuse.

on high speed the power does not go through that fuse or use the resistor coils to reduce voltage to fan. On the lower speed, the power goes through the fuse and the resistor coils to reduce voltage to fan. The resistor coils get hot. They are cooled by the air from the fan. The resistor pack fits into the ducting so the electrical plug is outside the ducting but the coil bits are inside. If for example the fan got stuck , then there would be no air to cool the resistor coils and they would get very hot due to increased electrical load of stuck fan and then you have a fire. That's where the thermal fuse comes into play. The fuse blows above a certain heat to cut power before fire occurs. the thermal fuse still looks good when blown - it just goes inside where you can not see it.

I had a focus where the thermal fuse blew twice (I soldered a new thermal fuse in place (they are a standard electrical part used in other stuff like hair straighteners) instead of buying a new resistor pack). After the 2nd time it went I thought there must be another reason, I found the motor was stiff, puts an extra load on the power needed causing more heat and hence thermal fuse blows. Removed motor, carefully lubricated bearings, soldered new thermal fuse in place - was fine for years after that. (careful soldering them in as too much soldering heat will cause thermal fuse to fail).

I always think it's good to understand how things work. 

 

Study here just in case you missed it.

 

https://www.google.co.uk/search?q=2007+fiesta+heater+resistor+location&sxsrf=ACYBGNTFePRPHNRpGHKlbRYCUk9uTbEj2g:1578853788312&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjAmtHZ2P7mAhXZQUEAHZaqAJ4Q_AUoA3oECAwQBQ&biw=1920&bih=919

 

 

this seems to be the one which shows you how to get it out. looks like plenty of scope to do your neck in , getting in there to see what you are doing

 

Thank you both for helping me make sense of it all.

It’s great to know how it works and with the aid of one of the images I now know where it is. I’ve actually seen it and I have to say it’s not clear at all how I’m going to get it out without injury. 
 

Thanks again.