P38 GEMS AC not cold
- Thread starter rrdude
- Start date
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- 31,382
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- North Shropshire
Do you have the book symbol? The temperature blend motor(s) could be stuck
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- 31,382
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- North Shropshire
There's a blend motor for each side, plus a third for the distribution flap
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- 12,129
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- Sud ouest France !
But wouldn't you have a fault if a flap is jammed?
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- 31,382
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- North Shropshire
Yes you would, unless the ribbon is knackered and it's not showing up on the screen
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- 31,382
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- North Shropshire
But if the ac is working, ie the pipes are getting cold then what else can it be? If there was a blockage then it would over pressure and shut off?
Datatek
Well-Known Member
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- 43,931
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- Near Poitiers SW France
The question is how cold is the cold pipe and how hot is the hot pipe, one should be very cold, the other very hot.
Right, colder than you think, and hotter than you think
...dumb question, are your fans working properly? Is hevac reading cabin temp corectly/ is there a snowflake displayed?
Fans working, no errors, no apparent leaks, AC gets cold. Had AC tested and they found 10deg at vents..while I think it's not sufficiently cold, they seem to think it's normal for these contraptions.
Since then have sometimes been getting a loud crackling noise from the RHS blower motor. Removed, inspected, cleaned and put back as all seemed well as motor etc is very smooth. The noise is more like some hard plasticky interference is going on at that side.
Any ideas what it could be?
Additionally: whats a good source for a new ribbon cable these days for the hevac? Few pixels are out and may as well fix the next time I remove it.
Since then have sometimes been getting a loud crackling noise from the RHS blower motor. Removed, inspected, cleaned and put back as all seemed well as motor etc is very smooth. The noise is more like some hard plasticky interference is going on at that side.
Any ideas what it could be?
Additionally: whats a good source for a new ribbon cable these days for the hevac? Few pixels are out and may as well fix the next time I remove it.
stemac33
Well-Known Member
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- 550
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- Accrington, Lancs
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10c sounds rather warm at the vent if set to max cold
Datatek
Well-Known Member
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- 43,931
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- Near Poitiers SW France
+1 ^^^^^
Datatek
Well-Known Member
- Posts
- 43,931
- Location
- Near Poitiers SW France
Sounds to me like it's low on gas, mine has the same problem and a pressure check shows it's well down.
Thats what I thought however shop seems to think its ok .. these guys work on a lot of landies and came recommended...hmmm
Gas topped up a couple of wks ago and also checked by new shop.
I got it filled (think 1000/1200? - whatever the spec was) with the dye added to check for leaks etc. Then tested so expect
there are no leaks. Will keep and eye on it.
@stemac33 The ribbon fix still out of stock.
Now to track down what the loud crackling noise from the RHS blower motor area is. Its not the motor or anything inside as its all been thoroughly cleaned out (only found 1 dried leaf in there so clean to start with).
there are no leaks. Will keep and eye on it.
@stemac33 The ribbon fix still out of stock.
Now to track down what the loud crackling noise from the RHS blower motor area is. Its not the motor or anything inside as its all been thoroughly cleaned out (only found 1 dried leaf in there so clean to start with).
stemac33
Well-Known Member
- Posts
- 550
- Location
- Accrington, Lancs
Try this one.
Or
Range Rover P38 HEVAC Repair Connector
Product information Included in this listing is a Zebra connector which can be used to replace the display connecting ribbon on the HEVAC unit in a
shop.v8engines.com
Or
Range Rover P38 HEVAC Heater Display Zebra Connector Repair Ribbon | eBay
Find many great new & used options and get the best deals for Range Rover P38 HEVAC Heater Display Zebra Connector Repair Ribbon at the best online prices at eBay! Free delivery for many products.
www.ebay.co.uk
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- North Shropshire
When you say filled.. the p38 takes a huge amount of gas compared to many modern cars
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Nanocom will tell you what HEVAC reads for Heater pipes & Evaporator temps. Vent output depends on all the other sensores as well !!
