What are the reasons for the BYD Qin's air conditioner not heating?

[BradyAnn]

There are two reasons why the BYD Qin's air conditioner does not heat: one is poor operation of the heating control mechanism, and the other is the engine cooling system not heating up. If maintenance is required, the first step is to determine the direction. The method of judgment is to check the temperature of the two inlet pipes of the small heating radiator. If both pipes are sufficiently hot, it indicates poor operation of the air volume control mechanism. If one pipe is hot and the other is cold, it indicates a problem with the cooling system. If there is an issue with the air volume control mechanism, the air conditioning filter should be checked first. The air conditioning filter is mainly used to filter dust from the air, but during the filtering process, a large amount of dust can also accumulate on it. Over time, this can reduce the effectiveness of the air conditioner, leading to reduced air volume. If the problem lies with the cooling system, it may be due to the thermostat being constantly open or opening too early, causing the cooling system to cycle prematurely while the external temperature is very low. Especially after the car has been driven, cold air can quickly cool the coolant, preventing the engine water temperature from rising, and naturally, there will be no warm air.

[VonMila]

I've been driving this BYD Qin for three years now. Last winter, the air conditioning suddenly stopped blowing hot air, and I thought the car was broken. After checking, it might be that the air filter was clogged with too much dust, blocking the hot air from coming out; or the refrigerant leaked, making heat exchange impossible, so even cold air couldn't come out. If the thermostat malfunctions, no matter how well you set the temperature, it won't work, as it misjudges the room temperature and stops operating. Another issue could be the heating fan not turning, where a stuck motor or circuit problem prevents hot air from entering the cabin. In my case, cleaning the filter solved the minor issue, but in severe cases, you'd need to visit a professional shop to refill the refrigerant or replace parts. If there's an issue with the hybrid system's battery-related components in the Qin, it might also affect the air conditioning efficiency. Remember to maintain it regularly, cleaning the filter at least once every season, ensuring a worry-free summer and a warm winter. In short, don't delay—diagnose and fix issues early.

[StLilah]

I bought a BYD Qin less than half a year ago, and it's extremely frustrating when the air conditioning doesn't provide heat. There are quite a few reasons for this: the set temperature is too low, and I often forget to adjust it to heating mode by mistake; the air filter is too dirty, clogged with dust, affecting airflow, so it needs to be cleaned promptly; or the fan isn't working, possibly due to a short circuit or a faulty motor, preventing hot air from blowing out; it's also common for the temperature sensor to malfunction and make incorrect judgments. My car has a hybrid structure, and when the battery system is abnormal, the air conditioning stops working to protect the equipment. I've learned to check the manual; sometimes resetting the system helps, but if the problem persists, I have to take it to the 4S store for repairs. Don't ignore minor faults—it's not just uncomfortable but also poses a high safety risk.

[AmeliaFitz]

As a long-term owner, I always pay attention to preventing air conditioning failures in my BYD Qin. Heating issues usually stem from basic maintenance neglect: dirty filter accumulation blocking heat, timely cleaning solves most problems; refrigerant leakage or insufficiency weakens heat exchange; temperature control module malfunctions misreporting room temperature; fan bearing aging causing jamming. I check and clean the filter monthly, regularly inspect refrigerant levels, and ensure unobstructed air conditioning lines. This small expense saves major repairs, avoids safety hazards, enhances driving comfort, and extends lifespan.