1998 Mercury Villager Owner Guide 1st Printing - Page 66

Heating and air conditioning climate control system panel The standard heating system and the heating portion of the heating and air conditioning system are essentially identical. There is one exception, however; the air conditioning compressor may automatically engage when the Defrost position is selected to aid in defogging and defrosting the inside glass. When Defrost is selected, the A/C compressor will automatically operate when the outside temperature is above approximately 40° F (4° C), whether or not the A/C button is illuminated. Manual selection and illumination of the A/C button in defrost mode does not override the automatic compressor operation discussed above. Refer to the heating system operating instructions covered previously for a more detailed explanation of heating system operation. 62