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Posted on Jan 02, 2017
SOURCE: Heater running at max temp
You need to check the twin solenoid heat control valve found on the RHD side down by the base of the radiator. When these fail they mostly fail in the ''open'' state so hot water is constantly supplied to the heater. Possible causes 1 solenoid valve failed 2 cables and connectors to valve faulty (often suffer from corrosion and damage- inspect carefully) 3 voltage signals to valve from control module missing, the modules can suffer from a blown output transistor or damaged PCB tracks caused by high current shorting - (easily repairable) If its any comfort - I currently have a solenoid failure on one side of my valve so the passenger is roasting whilst I'm okay, good job its winter here ! I have checked all the above and know its a faulty valve so I will have to change it - but its a ***** of a job as there is no room to move !! hope this has helped - good luck !
Posted on Jan 07, 2011
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