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Your Heater Control Unit May Be the Reason You Have NO HEAT
You've got a good thermostat, a good heater core,coolant is flowing, and yet.....NO HEAT! What gives?Todauy we'ree looking at the Heater Control Unit (HCU)- the commander that tells the heating system what you want it to do. And sometimes, that command has to travel to a component you may know as the hot water valve, but the manufacturer may call something completely different.Case in point: a Crown Victoria that had visited multiple shops on the Hamilton Mountain without anyone finding the reason it wouldn't make heat. The wiring diagram finally revealed the culprit hiding behind a very…
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