Operates At Max. Heating Capacity Only

Cause/remedy:
a) Fuse blown.

Renew fuse or repair short.

b) Connections on dual valve (8) loose.

Re-bend sleeves of 4-pole coupler on dual valve.







c) Dual valve (8) defective.

Renew dual valve.







d) Feed line from fuse box to dual valve or from dual valve to selector interrupted.

Test electric lines (voltage > 11 V must be available at "MIN" engaged in 4-pole coupler of dual valve), recondition, if required.

e) Temperature selector defective.

Check temperature selectors and renew, if required.