Chill with Confidence: Ace the 2026 ASE Air Conditioner Exam and Keep Cool Under the Hood!

Question: 1 / 400

If both hoses to the heater core are hot, what might Technician A be correct about?

Clogged heater core

Misadjusted temperature control cable

When both hoses to the heater core are hot, it indicates that coolant is flowing through the heater core efficiently. In this scenario, Technician A is correct in stating a misadjusted temperature control cable could be the issue. If the temperature control is not properly adjusted, it may not be allowing for the proper control of the air temperature entering the cabin, resulting in insufficient temperature regulation despite the fact that both hoses are hot.

This situation reflects a problem in the control mechanism rather than a flow issue with the coolant itself, which is why the other options concerning physical blockages or mechanical failures are less appropriate. A clogged heater core, faulty water pump, or blocked coolant passages would typically present with uneven temperatures in the hoses, indicating a problem with coolant flow, which is not the case here.

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Faulty water pump

Blocked coolant passage

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