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Possibly you need a new heater core ..... 200

posted by  Ken C on  Thu Nov 27 19:41 CST 2014
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last visit: Fri Oct 24 11:39 CST 2014
[RELATED]

The human skin's sensoria is really a lousy judge of temperature. What you really need is to measure (thermocouple probe, or the newer IR remote thermometers) the temperature increase of the air going through the vents (via the core) compared to ambient temperature.

Heater output that feels hot in the summer could be that, in summer weather, you're relatively intolerant of even a little additional heat and it's uncomfortable, but in reality very little additional heat has been added to the existing heat content of the air blowing through the core..

Likewise, heater output that's barely warm in the winter could be that there simply isn't enough heat being added to the ambient air blowing through the core to make it hot enough for you.

Thus, your observations could stem from a heater core that's all clogged up, either externally from leaves and other dirt, or else internally from precipitate mineral deposits from the coolant solution.

Or, if it isn't a blocked core, then for some other reason, you don't have enough coolant flowing to the core from the engine.





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