Heater switches

Good news and bad news relating to my 1999 C Class heater switches.
I decided my heater blower was faulty because of the switch. When the car was left overnight the blower wouldn't work. After pushing and pulling on
the switch a few time it would come on and work all day. Yesterday I took the electronic switch assembly out and gave it a good soaking in 'switch cleaner' (available from all good electrical shops) paying particular attention to the electronic rotary switch in the centre of the blower dial. (You need to first split the plastic housing until you can see the printed circuit board).
I reassembled and replaced the assembly and 'hey presto' it works better than ever. Problem solved.
Now the bad news:
One of the backlight led's has stopped working and i'm not sure if it can be replaced. The pcb looks like it may come away from the rest of the plastic framework and the bulb pull out but I don't want to force it in case I wreck the thing.
Has anybody done this. It's a shame to have to replace the whole unit after me fixing it but not having illuminated switches at night is really irritating.
KW
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The bulbs should be replaceble... take a closer look at it... backlighting is done via the side.
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'Fraid not. The unit is in a plastic housing and is self contained. The only lighting is via 2 tiny bulbs or led's. To get to these you need to prise the pcb away from the rest of the assembly. It doesn't want to come easily and I'm afraid to pull it too hard in case I totally bugger it up.
KW

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Couldn't be simpler. Pop the knobs off with a small, flat blade screwdriver. Put PVC tape on the tips of some needle nosed pliers, for grip. Then use the screwdriver to move the little plastic flap that covers the bulb out of the way and pull the bulb out with the pliers. Then pop the new bulbs in. Simple. Takes about 5 minutes to do all the bulbs.

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lee.hewing wrote:

That could be simpler.
--

Nothing is the way it is because that's the way it has to be.

1 HP = 745.69987158227022 Watts
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