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ford focus heater problem!

bargain buyer Avatar
6y, 2m agoPosted 6 years, 2 months ago
my heater on my focus at first only blew air out at number 4, and nt at 1-3, but now it doesnt work all together changed the resistor that didnt do the trick does anyone knw wot could be the cause? many thanks in advance and also will it fail MOT if heater nt workin got one next week
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6y, 2m agoPosted 6 years, 2 months ago
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#1
It won't fail MOT for not working. Sounds like your fan resistor see this link http://www.rac.co.uk/forum/showthread.php?t=547
#2
Probably your heater matrix or the switch that controls the heater matrix.
#3
shauneco
Probably your heater matrix or the switch that controls the heater matrix.
is the switch the thing that plugs in behind the heater dial
#4
soz i dont know how to add a pic but could it be this http://www.allenparts.com/cgi-bin/os000003.pl?ACTION=Start
#5
redted1977
It won't fail MOT for not working. Sounds like your fan resistor see this linkhttp://www.rac.co.uk/forum/showthread.php?t=547
thanks ive ad that changed still no joy just dont wanna spend a fortune on parts that not going to fix it
3 Likes #6
Hi found this on passionford.com, may help -
THE COMPLETE SOLUTION - I had a similar problem on my 2002 Focus Ghia Estate, with only no. 4 position on heater blower working. The heater fan sometimes has had a squeaking noise like a leaf was caught in it or something, but not all the time. I took the advice here and replaced the resistor pack behind the glovebox. My local Ford dealer suggested buying the replacement plug in case it was burned out, which I did. Needless to say, the plug was fine on mine. After replacing the resistor, all 4 fan positions and the A/C worked fine. I returned the plug for a refund. After a couple of days the squeaky fan was noticeable again and then I found that only fan 4 position was working. Running the fan on max I noticed a fluctuation in fan speed coincidental with the squeaking. I sussed that the fan motor bearings were the problem and that the electrical overload had blown the resistor pack. This is most likely the cause in all cases, as on the resistor pack, below the green part which encases the resistors there is what appears to be a small resistor soldered between 2 terminals. This is in fact a sensitive, non-resetting thermal fuse. It is rated at 215 deg. C and this is what causes the pack to fail. I removed the fan and motor and found that the motor was stiff to turn. It is set in moulded rubber within the outer housing. By using a flat blade screwdriver to press down the rubber moulding tags the motor and moulding can be removed from the casing. The bottom bearing showed signs of rust but was not worn so I used some engine oil to lubricate it, making sure that it entered the bearing and wiping off all excess (do not allow oil into the motor or brushes!!) I used a long spout oil can to reach the bearing behind the fan too. After turning it rotated freely. The motor and moulded rubber were reinserted into the casing (use a little washing up liquid on the tags, and ensure they fully engage using a flat screwdriver). The fan assembly was plugged in while somebody held it tight as I ran it on the 4 setting. It rotated freely. Don’t just leave it on the floor of the car as it will jerk around when switched on!!! The fan assembly was replaced. Now for the resistor pack. I obtained a replacement thermal fuse from Maplin (228 deg C or 192 deg C as they do not do a 215C) for £0.79. I cut off the existing fuse which seems to be welded in place, not soldered, and using a soldering iron, tinned the terminals (and remaining fuse ends). The thermal fuse is sensitive to heat, so I used a pair of pointed pliers to hold close to the fuse to drain the heat as I soldered one end in place, then the other. I don’t know if the fuse is directional but I kept the cone shaped end on the same side as the original. After trimming off the excess wire from the ends of the fuse, the heater resistor pack was plugged in and worked perfectly. No need to spend £12 plus from Mr Ford on a new resistor pack when £0.79 will do !! My heater blower now works perfectly. I guess the bearing problem may return eventually, signalling the need to replace the fan/motor unit, but they are available on Ebay from £25 upwards (may have similar dodgy bearings), so possibly better from a scrap yard if you can examine it first. Otherwise new is £170 plus from main dealer.
#7
bargain buyer
redted1977
It won't fail MOT for not working. Sounds like your fan resistor see this linkhttp://www.rac.co.uk/forum/showthread.php?t=547

thanks ive ad that changed still no joy just dont wanna spend a fortune on parts that not going to fix it


If you read through the thread on RAC website it looks like theirs more than one resister, Also a thermal fuse is mentioned on page three, If not then the switch/wiring or heater matrix.
#8
thanks everyone really as helped me, went to ford garage they wanted 45 quid just to check it over to see what was causing the problem. so will try all methods that are mentioned thanks again x
#9
Angryman81
Hi found this on passionford.com, may help -THE COMPLETE SOLUTION - I had a similar problem on my 2002 Focus Ghia Estate, with only no. 4 position on heater blower working. The heater fan sometimes has had a squeaking noise like a leaf was caught in it or something, but not all the time. I took the advice here and replaced the resistor pack behind the glovebox. My local Ford dealer suggested buying the replacement plug in case it was burned out, which I did. Needless to say, the plug was fine on mine. After replacing the resistor, all 4 fan positions and the A/C worked fine. I returned the plug for a refund. After a couple of days the squeaky fan was noticeable again and then I found that only fan 4 position was working. Running the fan on max I noticed a fluctuation in fan speed coincidental with the squeaking. I sussed that the fan motor bearings were the problem and that the electrical overload had blown the resistor pack. This is most likely the cause in all cases, as on the resistor pack, below the green part which encases the resistors there is what appears to be a small resistor soldered between 2 terminals. This is in fact a sensitive, non-resetting thermal fuse. It is rated at 215 deg. C and this is what causes the pack to fail. I removed the fan and motor and found that the motor was stiff to turn. It is set in moulded rubber within the outer housing. By using a flat blade screwdriver to press down the rubber moulding tags the motor and moulding can be removed from the casing. The bottom bearing showed signs of rust but was not worn so I used some engine oil to lubricate it, making sure that it entered the bearing and wiping off all excess (do not allow oil into the motor or brushes!!) I used a long spout oil can to reach the bearing behind the fan too. After turning it rotated freely. The motor and moulded rubber were reinserted into the casing (use a little washing up liquid on the tags, and ensure they fully engage using a flat screwdriver). The fan assembly was plugged in while somebody held it tight as I ran it on the 4 setting. It rotated freely. Don’t just leave it on the floor of the car as it will jerk around when switched on!!! The fan assembly was replaced. Now for the resistor pack. I obtained a replacement thermal fuse from Maplin (228 deg C or 192 deg C as they do not do a 215C) for £0.79. I cut off the existing fuse which seems to be welded in place, not soldered, and using a soldering iron, tinned the terminals (and remaining fuse ends). The thermal fuse is sensitive to heat, so I used a pair of pointed pliers to hold close to the fuse to drain the heat as I soldered one end in place, then the other. I don’t know if the fuse is directional but I kept the cone shaped end on the same side as the original. After trimming off the excess wire from the ends of the fuse, the heater resistor pack was plugged in and worked perfectly. No need to spend £12 plus from Mr Ford on a new resistor pack when £0.79 will do !! My heater blower now works perfectly. I guess the bearing problem may return eventually, signalling the need to replace the fan/motor unit, but they are available on Ebay from £25 upwards (may have similar dodgy bearings), so possibly better from a scrap yard if you can examine it first. Otherwise new is £170 plus from main dealer.
thanks for that ur a star x
#10
Thanks for the above advice, it worked a treat!!!!!!!!!!!
Part now £18.90 inc VAT!!! As of 22nd March 2013
Tomorrow I will buy the resistor which has only gone up a few pence, then I will have a spare, Result!!!!!!!!!!!!
1 Like #11
The Pollen filter - at the top of the bonnet/below the windscreen can let water into the fan blower which is what pumps the air around.

After a while, it will rust up and struggle to spin - hence the resistor pack blowing up and and only working on setting 4, until such point as it seizes up completely then you need to repair the blower, or get a new one in.
#12
Angryman81
Hi found this on passionford.com, may help - THE COMPLETE SOLUTION

I realise this is an old thread but just wanted to say that I stumbled across these instructions and they worked like a charm, problem solved for 85p! Many thanks!
#13
Again, old thread but i have this problem also. Slightly different in that only setting 3 works and 2 if you turn the blower gently down from 3. Tried a new resistor pack and nothing changed. Any thoughts there?

Cheers,

Sai
#14
Had same problem on Ford Focus 2004, blower only working on 4 & no air con. Changed resistor & all working
well (1,2,3,4 & air con). However, went to screw resistor back in & it was very hot, is this normal or yet another problem??
banned#15
hiyer if you put 2 or 3 socks on its hotter
put legging under you trousers and 3 tops on rember a hat and things
#16
Had this issue on an old Renault, that could be sorted by changing the switch itself, but may not be the same on the ford, remember, even though they want £45 just to look at it, if its something simple they will fix it in the price usually.
#17
Hi on my ford focus 2000 , I have had the glove box out, I have tryed to look for the blue resistor but cannot find it. Would it be anywhere else in the car ?

Thanks
Gh
#18
The resistor is housed in a small black rectangular box with 1 x Phillips head screw holding it in, right hand side of glove box low down so difficult to worn on first time, I've now got used to it;-(
#19
where is the thermal fuse located
#20
You will find the black rectangular housing fixed to the bulkhead of the engine bay!
Remove the glovebox, then look to the right hand side of the space now open, it is there just to the left of the centre console & fixed by a single phillips screw.
Remove, unclip the cable which only fits one way & inside you will find the green/blue resitor with the tapered thermal fuse accros the top of it - Awkward the first time, but I can do it in less than 5 minutes now!
#21
THE COMPLETE SOLUTION works a treat - thanks for taking the time to put up online and explain in such an easy to understand way. Much appreciated.

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