Quote:
The way that I check if the headmaster is working properly is feeligng or taking the tempeture on the three tubes of the head master if I feel that the three tubes are on the same temp then is bypassing is the weather is hot the head master is faulty. because is not supposed to be bybassing to raise the presure.
The head master has a refrigerant charged dome on it that reacts to the ambient temperature. If the temperature drops, the pressure in the dome drops and permits more refrigerant flow into the receiver and less into the condenser.