Could be a thermostat issue being stuck open and not allowing the engine to reach operating temperature in the cooler weather.
Or it could be heater core issue...again.
Could be a thermostat issue being stuck open and not allowing the engine to reach operating temperature in the cooler weather.
Or it could be heater core issue...again.
Live, Love, Forgive and Never Give Up
Have a shop pressure test your system. Should be able to pressurize the system and it should stay and not lose pressure. If there is a pressure loss you have a system leak someplace.
By process of elimination if you don't have any leaky hoses then you likely have a leak in the heater core.
Also, have you noticed your windshield fogging up in the morning when you start it or any moisture on the passenger side carpet?
If all of this is normal you may have a clog starting to form in the core that you can flush out.
Here is a link on flushing a heater core...not sure this is the best chemical to use (looks like CLR) but you'll get the idea.
http://www.youtube.com/watch?v=dcL_0TWeZJY
Hope this helps
Last edited by Mile High VX : 11/02/2014 at 09:22 AM