当您打开汽车的加热器时，它应该开始吹热空气。如果发动机已经处于工作温度，则应该立即发生。However, if your engine is cold, it will take longer and if the weather is cold, the process is even lengthier.
There’s no real answer to how long it should take a heater to warm up during cold weather. It really depends on several different factors. One of those is the type of vehicle you’re driving. Most older cars can require several minutes or so to come up to operating temperature and for the heater to start working. However, some newer cars require only a minute or two. Another factor is the temperature – if it’s very, very cold (think northern Minnesota in January), then it can take longer for even newer cars to build up enough heat to create warm air in the cabin. Other considerations include the following:
Thermostat Condition：汽车中的恒温器会根据发动机工作温度限制冷却液流动。如果卡住了，您的加热器可能永远不会吹热空气，因为发动机的工作温度永远不会达到正确的水平。
Low Coolant: If your engine coolant level is low, your heater might blow mildly warm air, or it might blow only cool air. That’s because your car’s heater works on coolant – the coolant cycles through the engine, absorbs heat, and then transports that to the heater core in your dash, where it’s used to warm the air blown out of your vents.
If your heater takes a long time to warm up, or never warms up at all, it’s a sign that there’s something wrong, and you’ll need toyour heater inspected and diagnosed经过a professional mechanic.
