Heater fan - best way to diagnose?

I've got a Gen 11 unit mounted in centre of firewall. Pics later. The only thing being designed for LHD the heater hose and evaporator outlets are on right. I just got some 180degree fittings they are cheap and available to route a/c to left. The heater hose unit comes with proper isolation valve more than enough room to fit this behind unit and used normal heater hose no issue at all. The defrost outlets are in correct place- towards firewall and a/c - heat outlets - also looking good. All modern stepper motors etc etc. and light way lighter than original units.

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Originally Posted by Meccles

I've got a Gen 11 unit mounted in centre of firewall. Pics later. The only thing being designed for LHD the heater hose and evaporator outlets are on right. I just got some 180degree fittings they are cheap and available to route a/c to left. The heater hose unit comes with proper isolation valve more than enough room to fit this behind unit and used normal heater hose no issue at all. The defrost outlets are in correct place- towards firewall and a/c - heat outlets - also looking good. All modern stepper motors etc etc. and light way lighter than original units.

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Yes please pics :)
Since I am going to replace it - I would love to update it in some way :)

Here's what I have done. Note I will be replacing the flat bar across top of dash with angle the flat bar flexes too much. I will post a few replies cause I took a few photos
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This is gap between unit and firewall and where I ran hoses
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This is heater water control valve fits nicely near underneath dash
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This shows demist outlets there are two but will T them off to use original outlets on dash
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This shows 4x a/c outlets will hook these up to 4 x eyeball outlets that exist already in dash
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This is 180 degree fittings for a/c hose
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This is heater hose plumbing
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This is clearance under unit to transmission tunnel
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This shows where I ran engine bay hoses compressor is on passenger side of engine I used bulkhead fittings. Cable clamps still to come.
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This is control unit I chose in keeping with LR style
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You get very good instructions with the unit. It does not come with a/c hoses or control unit as you have to chose the style of what you want. It does come with heater valve all wiring all duct hoses and mounting brackets
Attachment 127102

Bloody hell Meccles, that's got to be the best solution I've seen to the problem of the original heater-and-aircon mess. I rebuilt my heater and had a horrible time shoehorning the thing back in, a job I'll never forget. I don't even have it connected up here, I just wanted it rebuilt for later! I also reinstalled the original aircon but then put a new unit up in the cargo barrier, so the original has to come out one day. But who in their right mind wants to fiddle with that awful dash if they don't have to?

That's bloody impressive Meccles!

I rebuilt the original heater in my POS when the 81 body went on. Rebuild was really just new felt on the control flaps and lubing the bronze bushes in the fan motor.

This was done with the whole dash out, like you have done. I prefer the early ones without the gauges up top so the 74 one was going in, in place of the 81. It's really the only way get the heater unit out to repair / replace.

Taking the whole dash out seems like a daunting prospect before you do it, but I can't remember any big hassles.

Cleaning up any electrical issues, etc while the whole dash is out is also really simple.

cheers, DL

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Originally Posted by 350RRC

Cleaning up any electrical issues, etc while the whole dash is out is also really simple.
cheers, DL

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Amen to that.

Not to mention cleaning up all the 22+ y.o. dustbunnies, washing out the ac ducting, clearing drains, checking for bulkhead rust...

I've just got to hope that the cunning plan works[emoji51]it should - but the proof will be in pudding. Next challenge is fitting biggest condenser I can. Will update all in 77 thread with how it goes

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Originally Posted by Meccles

I've just got to hope that the cunning plan works[emoji51]it should - but the proof will be in pudding. Next challenge is fitting biggest condenser I can. Will update all in 77 thread with how it goes

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early RRC
Attachment 127138

Late RRC

Attachment 127139