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c10noob · 11-25-2014, 01:17 PM

Thanks everyone for all the replies, I removed to plug and saw that there is no build up so that was ok. All linkage to and from the controls are functioning and intact. The hose to the radiator from the intake gets piping hot but neither of the hoses to the heater core get hot at all, both are slightly warm but I believe its just from ambient heat from the motor running. So I guess the next step is to swap out the thermostat??

11-25-2014, 01:17 PM	#10
c10noob Registered User Join Date: Oct 2014 Location: oakley, ca Posts: 23	Re: How do I diagnose my heater? Thanks everyone for all the replies, I removed to plug and saw that there is no build up so that was ok. All linkage to and from the controls are functioning and intact. The hose to the radiator from the intake gets piping hot but neither of the hoses to the heater core get hot at all, both are slightly warm but I believe its just from ambient heat from the motor running. So I guess the next step is to swap out the thermostat??