Question about 1998 Volvo S70
Has always supplied little heat to the floor area. Does not respond to correct directional setting.
Always blows hot air up the windscreen wherever the flow is directed. Only stops is the system is turned off.
Now blowing hot air to the passenger side despite setting it for cold. (Not very useful when it is 32 degrees outside)
The temperature control dial has lost its 'clicks' & is smooth to turn.
Do hope you can help? Is there any diagrams available on-line?
Thanks you - Joan Blanch
The climate controls on your Volvo are all electronic at the control end, but likely have little vacuum motors to control the opening and closing of heater valves and air directional flaps in the innards of the dashboard. With the "mature" nature of your vehicle, it is sometimes a cracked vacuum hose or that the rubber end is getting a little hard and now leaking at the nipple where it is plugging into the vacuum valve. IF this is the issue, you MAY be able to here a hissing noise immediately after turning off the engine. Crawl down and get your head (ears) right under the dash. There may be a cardboard/plastic cover plate on the underside of the dash that you have to remove to get access.
But from the symptoms that you describe in your post, "Temperature dial has lost it's clicks"... I SUSPECT that the contacts on the control module may be totally worn out for both the direction of flow and the temperature control. Modules are available on eBay/Amazon (usually used) and it should be quite straight forward on how to remove / replace. The link below provides both links to purchase the control and also some YouTubes on how to replace it.
Hey... do you have a Pick-n-Pull or similar self-serve auto-wrecker near by? Often you can see what vehicles they have on their lot. It appears that s70 v70 and c 70 Volvos from 1998-2000 all have the same control unit. I've also included the part number in one of the photos... do a search for that and you may find more hits.
I hope this helps you Joan!
1998 Volvo S70 2 0 Google Search
Posted on May 15, 2017
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Posted on Jan 02, 2017
SOURCE: volvo s70 radio code
You must take the car to a Volvo dealer so they can reference the code from the VIN number. If you call it in, they only assume you stole the radio. Sometimes you have to prove you own the car.
Posted on Oct 31, 2008
This may be one or two different problems. One could be the climate control unit itself. Surprisingly the problem with the air not changing the source will likely be remedied by a reprogramming by a Volvo dealer. Defrost is the delfault outlet if there is a problem with that system. As for the dial not having detents and the cold instead of hot air in the pass side, that could be programming, a disconnect with the heater door for the passenger side or it could be the control unit. 98 is a difficult year to diagnose and the dealer is likely the only one who can properly diagnose this car. The download at the dealer is an inexpensive fix. If there is a mechanical problem within the air system that could prove more costly. I'm not sure how much the control unit for the climate control system, but there are usually quite a few on ebay. Good luck and I would suggest visiting the dealer first for this one as it is the least expensive fix and could very well be the only problem.
Posted on Feb 20, 2009
IT is very easy get all of the intake ducts out of the way to get access to the starter motortakk off rubber boot and first disconnect neg battery terminal next unbolt two bolts that hold starter and the 3 wires and ground terminal from starter (i have a 14 millimeter wrench that i cuit in half to make removal easier) and you should be all-set
Posted on May 31, 2009
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