Automotive Service Excellence (ASE) Air Conditioner Certification Practice Exam 2025 - Free ASE Air Conditioner Practice Questions and Study Guide

Question: 1 / 400

Which symptom could indicate a need for heater core replacement?

High pressure readings

Low air circulation through the vents

Water leaking onto the floor

A water leak onto the floor is a strong indicator that the heater core may need to be replaced. The heater core is a small radiator-like component that is responsible for transferring heat from the engine's cooling system to the air that is blown into the cabin of the vehicle. When it becomes damaged or begins to fail, it can allow coolant to leak out, which may drip onto the passenger side floor of the vehicle. This is often accompanied by a sweet smell, indicative of coolant, and may cause other related issues such as a foggy windshield or reduced heating performance. Identifying this symptom early can prevent further damage to the vehicle's interior and ensure the heating system functions efficiently.

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Unusual humming from inside the dashboard

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