Sorry to revive an old thread, but I also seem to have the same issue presented above, the heater gauge indicator is in the exact same place as the picture shown above but when I read the temperature from the a/c diagnostics screen it reads 101-103 C in hot day weather and at night it reads around 98C, I know that the normal operating temp of this engine is ranger from 80-95C and I recently just changed the coolant and still shows the same temperature plus the heater blows not so hot air into the cabin when on, just above warm like kinda hot, not HOT. So I was wondering if someone could point me to what direction should I start investigating, I will start by changing the coolant temp sensor and see what happens.
Thank you