1/4drive | Auto Insider | Since: Jun 2011 | Posts: 25 | Fixes: 1539 | View Garage
I'd renew the thermostat.
Higher speed = more airflow=increased cooling,
so the thermostat "ought" to close somewhat to compensate.
Posted on Tuesday 17th of November 2015 Don't understand this?Ask a question
Dave O | Driver | Since: Oct 2015 | Posts: 0 | Fixes: 0 | View Garage
I have the same problem with my 2009 C Max Titanium 1.6 tdci . OK when driving locally but on Motorways etc the heater gets cooler . If I turn quick clear screen on or turn heater knobs to maximum it gets hot again. I know this is not the solution to the problem but it might help to pose the question to others. The temperature gauge shows the engine is at normal operating temperature.k
Posted on Wednesday 26th of October 2016 Know the answer to this?Post a solution