Auto Air Conditioning & Heater Repair: Compressor problem?, daihatsu rocky, diahatsu

Question
QUESTION: My query is regarding the air-condition compressor in my car, which will not engage unless I put the blower to the maximum speed. Thereafter, the compressor will continue to function even though I lower the bower speed. I have changed the blower switch but the problem persists. I have asked around and the answer given to me was either the compressor or the thermostat needed attention. If it is the thermostat, how do I get excess to it and check whether it is faulty?

ANSWER: Hi Yahaya

I need your make model and year of  car.  This will help in answering your question.

---------- FOLLOW-UP ----------

QUESTION: It is a Daihatsu Rocky 1998 cc Petrol 4WD - 1984 model.

Answer
In the states we do not have too many Diahatsu.  On some Japanese cars the resistor controls the blower and the compressor.  Not sure but I would check to make sure no one has tampered with the electrical.  The thermostat should be at the evaporator case.  When you find it start the car and check for a power on the thermostat if it is good the power should go in and come out the other end.