System Operates At Left or Right Only

System Operates At Left or Right Only, Temporarily At Increased Heating Output At Selector Positions Except "Max" (Engaged).

Cause/remedy:

















a) Contacting at dual valve left or right inadequate.

Check contacting or recondition.


b) Inadequate contacting at one of the two heat exchanger sensors.

Check contacting or recondition.


c) Dual valve temporarily sticking or its seal damaged. Renew dual valve.


d) Electronic switching unit for contacting of temperature control faulty or unit defective.


Recondition electronic switching unit for contacting temperature control or renew unit.