You can find an air conditioner for a 1994 Volvo 850 on Ebay. The Volvo 850 was designed by Jan Wilsgaard. There have been 1,360,522 units made between the years 1991 and 1997.
its located under the fuse box,pop the hood and unscrew the four TORX bits(t-25)and the relay is located underneath the cover
Willis Haviland Carrier
960 S90 does not have a cabin air filter, Volvo started putting them in the 850 deries
The 1997 Volvo 850 low pressure port is located on the air conditioning compressor. The low pressure port will be on the right hand side of the compressor.
Incorrect refrigerant charge?
The 1997 Volvo 850 evaporator drain tube is located on the bottom of the air conditioner compressor. The evaporator drain tube carries condensation away from the engine.
A leaky mass airflow sensor or it can be a leak in the air intake hose.
The 850 does not use a MAP sensor. It uses a MAF sensor that is located and attached to the air filter housing lid
its located on the top left side of the engine compartment. instructions are here:http://volvospeed.com/pollenfliter.php
The fuse should be under the hood in the fuse panel it is #32 on the 97 850 sedan. blower speed 4 is on a separate fuse. I had the problem of speeds 1,2,3 not working and the culprit was the balast resistor. it is ceramic unlike the metal coils used in the American cars. the ceramic deteriorates and the wires break inside the resistor. see answer for ......Where is the air and heater blower relay located on a Volvo 850?.... to find out where the resistor is located.
The only butterfly valve I am aware of is in the carbuerator and contols air flow. Few cans still use this item.