HEVAC unit causing intermittent problems

rangiegal said:

I was interested to discover that intermittent climate control issues which mimic ye famous blend motor saga, can occur with a HEVAC unit which is slowly losing its mind.......I've just had the three notorious blends replaced with brand new ones and lo and behold a few days later I get what I thought was a temperature blend problem......blasting hot air on drivers side, no matter what temp you set, and the dreaded open book.....next time I started it stuck on cold only, again just drivers side. Between starts, it would clear and run perfectly , no horrid open book, so really was intermittent. I described the problem to Jason the mobile tech, and he duly arrived after 7pm one evening with a HEVAC unit which he knew was fully operational and swopped mine out as a trial...........and it seems to have worked........:clap2:

I know these cars are 10 years old and more but these electronic failures are a right pain not to mention expense:doh::doh: Thank heavens a stealer didn't get anywhere near it!!!

I think I'll just head off to ebay now to list the knackered HEVAC, the old RF receiver and the window switch panel which packed up in the snow:hysterically_laughi

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gemsdad said:

hi RG,have had any probs with the front panel,the part where you control the air con etc.

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rangiegal said:

Yup, thats the one and same thing, the front panel AKA the HEVAC unit. A little electronic box which costs nearly £300 from a stealer and when the circuitry starts playing up , you can get intermittent problems mimicing the traditional blend motor failure when in fact the blends may not be the problem. At least the HEVAC unit just slides out easily like a stereo head unit. Lots of faulty ones do the usual pop up on ebay trick, apparently, so you have to take care. Luckily, Jason keeps one or two used ones which he knows are in good working order to test systems which play up after blend motors have been changed. I guess stealers would have a field day if someone wandered in ignorantly - it would be several grands worth before you could blink and way more than the retail price of the cars at present!!!!

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RR Qatar said:

RG, Am stuck in the middle east with an L322 with same problems you have had, dealer is not much help either, is your mobile guy, Jason, familiar with this model, if so could you please forward his contact number, maybe worth giving him a call, inside of car now looks like a train wreck having removed all dash panels and still no wiser.

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gemsdad said:

hi RG, thats what i thought,i am having the same probs as you but i have only got the paupers version,not the posh one like you,i bought a complete heater unit with the blend motors and the hevac but it is the wrong one for my car,i will ebay it and get the right one for mine.

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rangiegal said:

Oi, I thought all Rangies were posh Whats the difference between my climate control main unit and yours? Its the jobbie that fits under the radio slot on the dash.....I know some Rangies don't have heated seats, but I thought the other controls were standard??? Don't tell me there's a Class System present in Rangies as well Apparently these head units can cause a lot of intermittent nuisance faults which can make the blend motors appear to be playing up when they aren't, so if you've changed blends and you are sure they are working and still have the temperature on blazing hot problem, its likely to be the HEVAC, or control unit.

There are always a few on ebay, but you have to make sure of the provenance of a used one and get a warranty, or you'll just end up buying someone elses knackerooed one in ebays "pass the bu***ered parcel" game, bit like the old RF reciever in new box trick.

On another note, I was totally gobsmacked to hear that there were MANUAL seats for Rangies, can't imagine the turmoil I'd be in if I had to shift a seat MANUALLY......:violin::hysterically_laughi

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gemsdad said:

hi RG,my hevac only has the three control knobs on the front with the buttons to control the air direction,i do not have the screen etc,i have got my air/heating sorted now after a lot of fannying about,thanks to irishrover and myself we managed to work it all out,now i have got a nice shiny hevac like yours to sell,know anyone.:nospamhere:

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rangiegal said:

Oi, I thought all Rangies were posh Whats the difference between my climate control main unit and yours? Its the jobbie that fits under the radio slot on the dash.....I know some Rangies don't have heated seats, but I thought the other controls were standard??? Don't tell me there's a Class System present in Rangies as well Apparently these head units can cause a lot of intermittent nuisance faults which can make the blend motors appear to be playing up when they aren't, so if you've changed blends and you are sure they are working and still have the temperature on blazing hot problem, its likely to be the HEVAC, or control unit.

There are always a few on ebay, but you have to make sure of the provenance of a used one and get a warranty, or you'll just end up buying someone elses knackerooed one in ebays "pass the bu***ered parcel" game, bit like the old RF reciever in new box trick.

On another note, I was totally gobsmacked to hear that there were MANUAL seats for Rangies, can't imagine the turmoil I'd be in if I had to shift a seat MANUALLY......:violin::hysterically_laughi

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Datatek said:

I'm pleased to say my DSE has only got electric adjustment for height, I can do without all that electrofrickery, just more to go wrong

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nathan5346 said:

my dse aint even got that, i got a handle on the side for the height its a nice handle tho

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