I feel that there's always lots of moisture inside my 940 passenger cabin. At the same temperature, same humidity and without A/C, I always feel dryer when sitting in other's people cars. One thing that I observed is that the air temperature blowing out from the vents is slightly higher than the ambient temperature even though I turned the temperature dail to the coolest, is that normal? Any suggestion would be appreciated

1994 940 240,000km

Temp control valve inline with heater hose is under the hood near DS firewall. It often is a problem with our Volvos and should be replaced if you have not done it. And even if you are wrong it is cheap PM you!, because it will go sooner or later (check vac hose to it also)

Good Luck "Park"

Also, make sure that the control button, and all the associated valves etc, for the re-cirulate air function are working properly and are drawing in outside air. Not just re-circulating humid interior cabin air.

Dear 940 4ever,

May this find you well. I second Ringlee's suggestions. The heater valve is a low-cost part ($20 or less) with high costs if it disintegrates. This failure mode causes immediate coolant loss. Unless you shut-down within seconds, the engine overheats, warps the head, and requires a head-gasket job, which is nowhere cheap.

If you have not replaced the heater valve and the heater hoses, do so soon. At 240K Km, they don't owe you A/C/NZ/US/M/$0.05, Euros 0.05, etc.

At the risk of labouring the obvious, 940 radiators have about an 8-year working life. They tend to fail, by cracking at the hose connecting points. You might want to inspect yours, if it is has not been changed, to your certain knowledge.

Hope this helps.

Yours faithfully,

spook

Is there any leakage inside? Any wet carpets or headliner? Damp windows?

As for the temperature, your heater control valve is likely failing. See the 700/900 FAQ for instructions on replacement, which is easy.