What is the reason why the car air conditioner does not produce heating?

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What is the reason why the car air conditioner does not produce heating? 2021-11-08

1. Since the engine has just started, the temperature of the coolant is still relatively low at this time, so the warm air will not be blown out after turning on the warm air;

2. The heater valve and heater water tank are malfunctioning, which will also cause the car air conditioner to fail to heat up. The heating of automobile air conditioners uses the heat of the engine. The heating principle of automobile air conditioners is very simple. During heating, the high-temperature coolant in the engine will flow through the warm water tank, and the air blown by the blower will also pass through the warm water. Box, so that the air outlet of the car air conditioner can blow out warm air. The heating water tank is a heat exchanger, and this component is a key component for heating the car air conditioner.

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