P38A Heater unit service. What's to be done?

Bagshot said:

Right..
Am nearly at the end today.
Heater box out and split apart, all flap bearing surfaces cleaned, old dry grease (yuk) cleaned out and new white silicon grease in place. Not a noticeable difference in movement on the levers, but then they were pretty good already. Heater matrix flushed and find vacuumed out. Some corrosion on one corner but I think that was from the O ring leak. High tech pressure tested it..hand over one hole and blow down the other in a bowl of soapy water..passed.
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All reassembled and silicon spray on everything. Touch of grease in the gearing.
Motors opened up, no miissing teeth and pretty clean in each one, so sprayed out with some contact cleaner and silicon sprayed to death.

Everything back in, all ducting cleaned out AND..all joints gaffer taped together. Surprise how loose and floppy everything was. The joints had some dead foam in them so scraped off and used some draughed excluder to close the gaps and taped.
New foam on the top, (same stuff as above, 10mm thick) to replace the dead foam around the outlets.
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New bulbs in all the switches and HEVAC, new bulbs in the binnacle. Just ready to fire up tomorrow in daylight to check for leaks.
Phew...

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wammers said:

Do you have a Nanocom if so you will have to do a reset of the flap positions. This just cycles them and allows for new zero due to new foam. It will then need doing ever so often as flaps settle into foam. Car does this automatically but in later life not very often.

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Bagshot said:

Hi, unfortunately I don't possess one. However, I am assuming you mean the foam that is actually fitted to the flaps. This I didn't touch as it wasn't too bad and I had nothing to replace it with. The foam I did was the seals around the top. I see that the flaps only go back on their spindles one way, so will I still need to have a reset on these.

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wammers said:

Oh ok did you note the position marks on the front and rear distribution flap gears in relation to the quadrant? They MUST match up when the quadrant is moved fully forwards or back. Make sure they are correct at the end of each position.

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