Blower only works on full! - Ford B-Max Forum
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post #1 of 29 (permalink) Old 16th June 2019, 11:09 Thread Starter
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Blower only works on full!

Just popped down to the shops and noticed that the inside fan blower has stopped working apart from when it's on full. Tried various options, ie windscreen setting, direct 'in the face' setting, foot blower setting - none of them work unless it's on full blast. The air-con seems to operate ok. I put the heat control onto 'max' and again it only worked when I turned the blower knob to full.

Does anyone know why it should do this suddenly? Is it something the garage will have to fix? We did have one unrelated incident back in February when it was cold and the heater didn't seem to work for a day, then the next day it was all fine again! All very odd. The service manager at the garage where we had it serviced said he'd never heard of such a thing!

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post #2 of 29 (permalink) Old 16th June 2019, 13:32
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blower only working on full is most likely the 'heater resistor'
a fairly common problem

though it can also be a clogged cabin filter

see
https://www.bmaxownersclub.co.uk/for...n-control.html
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post #3 of 29 (permalink) Old 16th June 2019, 19:47 Thread Starter
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Thank you - looking at the link, it seems it might be that. I wondered if it might be a fuse, as in the handbook there are 2 fuses, one for full fan power and one for the rest, so will check that first. Would a clogged cabin filter just reduce the air-flow rather than what we have, which is no air-flow at all?

If the fuse is ok, might see if I can locate the heater resistor and see if it looks like it's no good, sounds like a fiddly job though!

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post #4 of 29 (permalink) Old 17th June 2019, 00:05 Thread Starter
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Btw, is the 'cabin filter' the same as the 'odour filter'? This was replaced at the last service done in May this year.

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post #5 of 29 (permalink) Old 17th June 2019, 14:23 Thread Starter
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Just found another thread that confirms that they are one and the same...

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post #6 of 29 (permalink) Old 17th June 2019, 14:58 Thread Starter
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Also, realised that the fuses I referred to were for the engine cooling fan, not the interior blower...(learning all the time!)

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post #7 of 29 (permalink) Old 18th June 2019, 00:17
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Quote:
Originally Posted by Gremlin View Post
blower only working on full is most likely the 'heater resistor'
a fairly common problem

though it can also be a clogged cabin filter

see
https://www.bmaxownersclub.co.uk/for...n-control.html
This exact same issue has just happened on my parents B-Max

Will try removing the pollen filter first, but if it were the pollen filter would some air not get through on at least setting 3 even if it's clogged because as soon as I put it on 4 the air blasts out.

Is changing the heater resistor an easy thing to do or not yourself?

Thanks
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post #8 of 29 (permalink) Old 18th June 2019, 11:42 Thread Starter
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I imagine that a clogged filter would only reduce the air flow. In my case, this filter, which is called an 'odour filter' by Ford, has been replaced a few weeks ago as part of the annual service. The link that Gremlin provides...

https://www.bmaxownersclub.co.uk/for...n-control.html

...does have some comments where people have described replacing the heater resistor - sounds like you need to be fairly agile and use a headlamp-type torch to be able to see what you're doing while lying on your back with your head in the footwell (having first removed the plastic panel). As I'm 61 I'm not sure if I 'qualify' as being agile, but I'll have a look anyway to see if I can manage it - my husband is too tall to even consider it!

A set of torx screwdrivers will also be needed (not sure which size, so maybe just the one if you can find out which). I'm going to attempt it once the weather's a bit drier. I think I've located a place to buy a replacement, although searching on the internet doesn't seem to bring up many alternatives for the B-Max version...or else they are so cheap (eg on Amazon) with reviewers saying they didn't last very long - I don't want to have to do it again too soon!

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post #9 of 29 (permalink) Old 18th June 2019, 11:49
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I found this resistor online which seems a reasonable price and also has a 2 year warranty, I'm presuming this is the correct part that's needed?

https://www.euspares.co.uk/parts/topran/13896920

Does anyone know the OE Part number of the resistor?

Thanks
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post #10 of 29 (permalink) Old 18th June 2019, 16:40 Thread Starter
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That's the one I found - on another site though - https://www.buycarparts.co.uk/topran/13896920

I'll have to wait till I get the old one out to check, I guess - unless someone else confirms it. I'd love to know if you, jonnypb, find out how difficult it is to replace!

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