hevac

Hi, I removed the HEVAC display unit to replace two bulbs, the ones for the temperature control switches. The display was working before I took out the unit, but the display has stopped working when I put it back in and connected the plugs. I then removed the panel again, and took it apart...

Greetings from a wintery Melbourne, Australia. It's getting cold so it's time to get the heating working properly. My issue was that the car would go both to HI and LO on the temp controller but not hold correct temp in between. All checks done on the HEVAC test page and all seemed well...

Hi folks I bought my RR on 31/03/19 and found out I had a battery drain problem the day after lol Mine seems to be that the little fan behind the heater control unit doesn't switch off when it's supposed to and seems to drain my battery in less than 24 hours. I have pulled fuse number 12 out...

Marty has kindly supplied to HEVAC which after a loooong holiday in customs finally arrived today. Sigh. So I happily connected the new HEVAC and still no luck. No airco. Argh. Let be known that it old one had next to 0 display and a broken fan knob. it was an early version and was replaced by...

Greetings from Melbourne Australia. Well I wouldn't say it's been all fun but there is a sense of satisfaction in keeping what is a great car going. Over the last few months I've been putting my 2001 Vogue back together; I blew the heater core because I ignored the sudden temperature spike...

When you press the key fob to unlock, the hevac fan on the passenger side (RHD) whirs into action. When you lock the car the same fan runs for a minute or two before sleeping. However, yesterday I locked the car as usual, but 2 hours later the fan was still running. The immediate thought was a...

Lost speedo, tach,fuel gauge, temp gauge, indicators & HEVAC As Title: Lost speedo, tach,fuel gauge, temp gauge, indicators & HEVAC HEVAC still works but have lost display. Out and about so have pulled all small fuses for a visual check under seat and in engine bay and look OK. P38 4.6 1996...

LHD 2.5DSE 1999 pre EGR/MAF Hi, I have an issue with the HEVAC I've been considering to check for a while. It's not that big of a deal but it could become one later on so better to deal with it now. As per the title. When driving on the street and making 90° turns I notice the air from the...

Hi All, Very new to the RR community and most likely going to have some naive questions to ask. So I purchased a 1998 P38 this Sunday just gone and these are the issues I've noted so far: RH-F Window Regulator Gone - banging at the top and not fully closing (Just need to buy a replacement as...

Replaced all three servo motors on the HEVAC system. Also while I was in there, I readjusted all of the ductwork to make sure all of the connevtions were still tight and not leaking (as best as I could). I am happy to report that the HEVAC system now works extremely well. There is plenty of...

Hi, I have my speedometer lights and hevac that blinks when blinker is set on the left. Sometimes i have the needle that are erratic when blinker is on the left. Any idea why? Thanks Florent

Hi all, If the 'Book' icon is displayed on HEVAC screen does it automatically disappear when the problem is fixed or does it have to be deleted? If so how does one delete the icon? How are errors read? Regards all Al

hi all, Having read as much forum information as possible on the HEVAC LCD backlighting I launched into the job of renewing the bulbs. I knew the LCD was actually working as in the right light you could just make out the display. The disassemble was exactly as described by this forum. The usual...

Hi, Been having issues with the old hevac control unit for a while, had blend motors go but temp was fine so didn't bother until now fixing it. Just changed the blends for new valeo ones but it seems now my control unit has its own faults! Has anyone ever given the unit to one of these...

range rover p38 4.6 hse Can anyone help solve my ongoing problem, I have a p38 4.6 hse 96 basically the hevac only works when I've connected the negative side of battery and turn ignition onto the 1st part when i go to start the car hevac stops working all together. Ive replaced fusebox...

The Nanocom has informed me why I get the intermittent checkbook symbol on my HEVAC display. It appears that both feedback pots on the right hand blend and distribution motors are failing. Manually driving the units with the Nanocom, looking at the feedback position, there are dead spots on...

Hi, I getting a new fault in my 1999 P39A Bosch. This book mark only seems to come up after first start up in the morning when the truck is left over night, it goes away later in the day. I'm trying to stay on top of any and all faults. Distribution door motor circuit fault (Feedback)

Hello All, Replaced my blend motor trio and now the display on the HEVAC does not light up. All of the other buttons do light up when engaged and seem to be working. The blend motors, I believe, are working. I took out the green-based display bulb/holder and if I wiggled it, there was...

My 2000 4.6 had a Webasto aux heater when I bought it, since it is not that cold over here and I need the space for an LPG unit I have removed the heater. Carefully tracing down all wiring to get the original state back I have seen the book symbol showing up several times. Everything works again...

Hi all, My problem is the HVAC backlight still doesn't work after changing the bulbs twice, just in case the first one was duff. Then checked for power to the bulb holder and nothing. So the bulb holder is NOT getting any power. Suggestions?