kenclarke Posted August 10, 2015 Share Posted August 10, 2015 Daughters KA running warm and losing water from expansion tank before fan kicks in. Fan working ok as starts when aircon is switched on. Top and bottom hoses warm and heaters blowing hot. I'm suspecting a faulty temp sensor but could it be something else. Thanks Quote Link to comment Share on other sites More sharing options...
MONDEO TXS 2.2 Posted August 10, 2015 Share Posted August 10, 2015 Faulty thermostat ? Quote Link to comment Share on other sites More sharing options...
kenclarke Posted August 10, 2015 Author Share Posted August 10, 2015 If it was thermostat, wouldn't the heater be cold? Quote Link to comment Share on other sites More sharing options...
btmaldon Posted August 15, 2015 Share Posted August 15, 2015 Thermostat housing has a tendency to warp if it is the plastic type and starts leaking. Also expansion tank cap can lose pressure and the expansion tanks sometimes split. Quote Link to comment Share on other sites More sharing options...
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