i am having a weird prob with my hf too, the temp gauge says the motor is at operating temp. but i get no heat and the motor and radiator and hoses are all cool to the touch, i have tried bleeding the system and replacing the thermostat, but i still get no heat. i dont know what to do. and it really sucks because this is my daily driver that i deliver pizza in and i live in ohio where it is not very warm this time of year. plus no heat gives me no defrost so that sucks too.