We are having the heat wave here the past few days, 0-2*C, getting cold again tonight - thanks for sending the weather our way!
Has it done this since you have owned it or just this year? I have never had a heat problem, except for the excess heat in auto mode while the back of the truck heats up.
Do you have the heater in manual mode or automatic? It probably doesn't matter, but as you may have noticed, when the truck heat gets up to almost normal the valve opens to let more water circulate to the heater core and then the fan blows strong. I'm guessing here, but perhaps the valve is closing for some unknown reason or the electronic controls are screwing up? Most of the heat problems tend to be from not ever getting warm enough; clogged core, vacuum or switch for the CC, thermostat, and finally the heat management system. Can you select full fan, or does it stop as well?
Last edited by twoicebergs; 11-21-2012 at 11:42 AM.