If you're referring to the blower motor:
On my 1992 940GL it was located under the glove box tucked in the back right corner. You will need to remove the bottom plastic piece that is farthest to the front of the passenger's side (where their legs are). It is held in with cheap plastic screws so be gentle. Then, loosen the plastic molding on the right side (it should be protruding) and inside you will find the ECU. Remove the ECU mounting bracket (Disconnect the battery just to be safe). Tucked away to the front right you should see the blower motor. You may have to awkwardly lie on your back to see it. It should be held in with three (hex?) screws, the rear one being a pain to get to. Remove the wiring connctor from the motor , unscrew and remove. Best of luck....
Above the right front passingers feet.
About 10.5 hours if good mechanic. Nasty job as it is behind the fire wall. You have to take the dash and the front console out just to get at it.
The Volvo 940 is defined as a Sedan. The Volvo 940 was one of the last rear wheel drive cars from Volvo. You can find more information about the Volvo 940 online from the Wikipedia. Once on the page, search for Volvo 940.
You will need to remove the water lines from your heater core. Remove the heater core retaining bolts. Reverse the process to install the new heater core.
YES
Location ac compressor relay 940 volvo
The heater core in a Volvo S60 is typically located behind the dashboard on the passenger side of the vehicle. Accessing and replacing the heater core usually requires removing the dashboard and other components in the interior of the car. It is a complex and labor-intensive process best performed by a professional mechanic.
no
Under the dash on the right side just above the toes of the passenger's right foot.
Yes. The 740 and 940 are very similar and share many common parts.
a 1992 Volvo 940 doesn't have a speedometer cable. the speedometer is controlled electronically.
Heater core failure.