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1994 850: Heating and ventilation control panel removal

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1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
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Mike850
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Year and Model: 1994 850, 1997 850
Location: Tulsa, Oklahoma

1994 850: Heating and ventilation control panel removal

Post by Mike850 » Wed Jan 24, 2007 12:43 pm

I own a sharp-looking 1994 850, red with tan leather plus sunroof. When I turn on the headlights, the heating and ventilation control panel lights do not light up. How do I gain access to the lights/and or how do I remove and replace the control panel? (The radio is easy to remove, but I can't figure out what holds that heating and ventilation panel in). :? Thank you!



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billofdurham
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Post by billofdurham » Wed Jan 24, 2007 12:56 pm

For the Electronic climate control:

With the radio out reach in the aperture and depress the locking button on the underside of the unit. Push out one rear corner of the unit to free it from its location and then remove it from the facia. Disconnect the three wiring connectors.

Bill.


Work was good - retirement is better.

1996 850GLT 2.5 20v Estate Manual.
1995 Peugeot Boxer 2.5Tdi Autosleeper.
Previously:
1984 244DL, Manual, Beige.
1987 744GLE, Manual, Green.
1991 960 3.0 24v, Auto, Silver.
1994 940T Wentworth, Auto, Blue.

tailor
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Heater unit, toggle switch and sc 810 bulb replacement

Post by tailor » Wed Jan 24, 2007 6:09 pm

After removal of the unit if I remember correctly there are 4 screws ,2 on each side ,holding the top cover in place, these need to be removed to gain access to the back of the plastic facia plate. There are a couple more in the plastic facia(white or cream)when these are undone the facia folds out forwards.There are 3 bulbs and they are inserted into black plastic holders and slide in,the holder has to be twisted to seat and release it.
Two things that you should do, take a sample with you when you buy new ones either at the dealer or Candaian tire equivalent. The replacement bulbs I found had a slightly thicker base a little gentle persuasion with the end of a flat screw driver enlarged the size of the holder, I SAID GENTLE PERSUASION.
The other thing that I would suggest is that before closing it all up make sure the 3 bulbs work, do not forget to turn up the adjustable dimmer switch before uttering the first of many obsenities if failure is upon you.
OH, lastly the fan may or may not kick back to life at full revs, for me it was just a temporary thing and when I restarterd the car it worked at full tilt.
I also had a measure of success in replacing the burnt out dash toggle switch bulbs, I used 12 v that I bought at an electronics store for $1.29 each.A lot of " finickering" ensued, apparently they are not meant to be serviceable.
See images below for the type of bulb used.

The radio sc810 bulb replacement did not fare as well. I started out by stripping a bulb from the wire and soldered it in the black two prong base holder that goes into the board.
My main dissapointment is that they are not as bright as the originals only 2 left as originals. Perhaps someone out there is better versed as to the type that should go into the radio. Make sure that the bulbs are not sticking out too far as you will crush them when replacing the front cover of the radio( experience talking here)
Good luck


1994 850 Auto Turbo wagon 306000km (Sold)
2004 XC90 AWD 188000km

"Life is like a reel to reel tape recorder,
the closer you get to the end,
the faster it spins."
Abe Gottschalk

tailor
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Post by tailor » Wed Jan 24, 2007 6:18 pm

picture of bulbs and process for radio bulb replacemnt
Image


1994 850 Auto Turbo wagon 306000km (Sold)
2004 XC90 AWD 188000km

"Life is like a reel to reel tape recorder,
the closer you get to the end,
the faster it spins."
Abe Gottschalk

Mike850
Posts: 103
Joined: Wed Jan 24, 2007 12:15 pm
Year and Model: 1994 850, 1997 850
Location: Tulsa, Oklahoma

Post by Mike850 » Mon Feb 12, 2007 9:33 am

Bill,
I have tried and tried to locate the "locking button" on the underside of the unit to depress it and still can't find it. I have a mirror inside where the radio was and using a bright light I still can't see it. Can you please describe again exactly how to remove the unit? I am removing it to replace the burnt out lights. I learned that contrary to what a co-worker told me (that drives a 97 850) that removing the knobs on the faceplate DOES NOT give you access to the lights. Thanks!



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billofdurham
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Post by billofdurham » Mon Feb 12, 2007 11:36 am

I am sorry I can not be more specific as, thankfully, my car is fitted with the manual climate control (less to go wrong).

My friendly Volvo tech tells me that you shoul be able to feel the button if you run your finger tips over the bottom of the unit.

Bill.


Work was good - retirement is better.

1996 850GLT 2.5 20v Estate Manual.
1995 Peugeot Boxer 2.5Tdi Autosleeper.
Previously:
1984 244DL, Manual, Beige.
1987 744GLE, Manual, Green.
1991 960 3.0 24v, Auto, Silver.
1994 940T Wentworth, Auto, Blue.

Mike850
Posts: 103
Joined: Wed Jan 24, 2007 12:15 pm
Year and Model: 1994 850, 1997 850
Location: Tulsa, Oklahoma

Post by Mike850 » Mon Feb 12, 2007 12:19 pm

Bill,
I have been improperly calling it the "heating and ventilation contol". You referred to it as the "Electronic Climate Control" but I've discovered that's not what I have. I referred to my owners manual for the proper description and what I actually have is called the "standard unit" (what you referred to in your car as the "manual climate control") and not the optional "Electronic Climate Control". I thought the ECC was just a little fancier because it had the temperature range of 60-84 degrees on the faceplate, ect. But after reading, I know now that it is much more than that. As a first time owner I'm still going through the learning curve. :wink:

So since you also have a '94 850 with the same manual unit, have you ever removed yours? I have pressed pulled even moderately forced the unit around :x and still can't figure out how to make it release. :? I don't want to fool around and break the plastic tabs or whatever it is that seems to have it locked in place! Thanks in advance.



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Post by Ozark Lee » Mon Feb 12, 2007 1:30 pm

Mike,

I have had the distinct displeasure of removing my manual unit. Completely removing it is a full on b I itch. I had to repair the drivers side temperature mechanism so I had to completely remove the unit unfortunately I didn't pay much attention to the lamps but I'm fairly certain that you can get to them without completely removing it.

To remove the unit you first need to remove both temperature knobs, the air mode knob, and the fan speed knob. They pull off but they don't pull off easily. I used a pair of pliers with a rag wrapped around the jaws so as to not mar the knobs.

Once the knobs are removed 2 screws will be revealed behind the temperature control knobs. Remove those screws to access the control mechanism. From there you might be able to get to the bulbs directly but I actually think you will need to got further. I'm working on memory but I think there are a couple more screws to release the assembly and I recall that you will need to remove the Fan switch and the AC/Rec switch assembly.

I'm thinking that the bulbs are the same as the goofy bayonet base bulbs that are in the instrument cluster, a dealer item.

...Lee


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Post by MadeInJapan » Mon Feb 12, 2007 2:58 pm

www.ipdusa.com sells them too if they are the same as the instrument panel's. http://www.ipdusa.com/ProductsCat.aspx? ... RootID=629
Call your dealer and see if they even have them. Often times dealers don't keep things this old. They probably can get them though from their supplier. Anyway, see which is cheaper and go from there.


'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
'07 S40 T5 AWD 6 speed manual! Silver/Black Stage1 Heico & Elevate
'07 S60 2.5T Blue/Taupe- my kid's Volvo

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billofdurham
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Post by billofdurham » Mon Feb 12, 2007 3:36 pm

Lee is right to here
are removed 2 screws will be revealed behind the temperature control knobs
but it goes further. This has got the front plate off. Now remove the fan control and recirc switches from the panel, undo 4 screws and slide the panel out of its aperture. Disconnect the wiring connector after removing 2 screws and removing the panel rear cover.

Note the location of the control cables so you refit them in the right place. Release the retaining clips securing the outer cables and detach the inner cables from the control lever pegs. Now remove the control panel from the car.

I have not had the 'pleasure' of doing this but my information is that the lighting is on a printed circuit board which has to be replaced if either of the bulbs has blown. To remove the PCB carefully remove the clips.

The manual climate control has less to go wrong but to replace a bulb is a major Volvo type job - and expense.

This is what it looks like when you drop it on a concrete floor:

Image

Part #11 is the PCB. It does mention a bulb (#11a) separately so a call to the dealer might show my info is wrong. I do hope so.
Bill.


Work was good - retirement is better.

1996 850GLT 2.5 20v Estate Manual.
1995 Peugeot Boxer 2.5Tdi Autosleeper.
Previously:
1984 244DL, Manual, Beige.
1987 744GLE, Manual, Green.
1991 960 3.0 24v, Auto, Silver.
1994 940T Wentworth, Auto, Blue.

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