Repair Vulcan cx90 control panel

Con requested 3 quotes from Heating Professionals in Glen Iris

CX90 Vulcan duct heater control panel has recently stopped working. Can it be repaired? If not, what will it cost to replace?

DHC AIR

1800coolfix t/as Australian Mechanical Services P/l

ASPEN GAS PTY LTD

DISCONNECTION OF HEATING.
DISCONNECTION OF HEATING.

DISCONNECT VULCAN 15 YEARS OLD OUTDOOR UNIT
DISCONNECT VULCAN 15 YEARS OLD OUTDOOR UNIT

Vulcan central heating service
Vulcan heater unit service (if necessary), duct clean and repair (definitely)

Repair fan in gas ducted heating system
the fan on my heating system will not go off - it stays on after the burner...