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Perry_P_M3W
Total Likes: 1
Original Post (Thread Starter)
#767058 01/15/2023 6:10 PM
by Craig Jezz
Craig Jezz
If anyone is experiencing a stiff rotary heater control knob, mine has been really hard to turn lately on my 2016. 4/4 Sport. So stiff had to use two hands before setting off today.

So this afternoon on my return, I decided to drop the under tray and dashboard to see what’s going on. I could see the bolt going through the two plates controlling the heater control knob was quite tight. I loosened the locking nut right off and sprayed WD40 silicone until it worked free again, applied a little grease and tightened back up, but not so tight this time. job done.

So if anyone else has the same problem turning the heater it’s any easy fix if I can do it.

[Linked Image]

[Linked Image]
Liked Replies
#809015 Oct 7th a 06:55 AM
by RichardV6
RichardV6
Originally Posted by Perry_P_M3W
Reviving this topic as mine has gone a tad stiff, so first off, thank you Craig for posting this.

For those with a 4/4, does your heater control knob just turn or do you have clicks? I did a few searches on TM and a few have posted that they do in fact have clicks/indents on the heater knob but it's not clear if that is a Plus 4 only thing or not.

See post here. It seems that some cars including mine didn't have the detent ball fitted from new despite the quadrant providing for this hence no clicking positions. All trads in recent years use this same heater control system.
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