The imported BMW X1 heater is not hot and the air conditioner smells bad. Fat Brother shares the repair steps.
Vehicle information: BMW X1 imported in 2011, 2.0T engine, with a driving range of about 100,000 kilometers.
The car owner described the fault:
This BMW X1 was just picked up from another place and has not yet had time to settle down. In the past few days, I have found two problems. One is that the heater is not hot at all, and the other is that the air conditioner has a very bad smell every time it is started, a bit like the smell of a dead mouse.
Steps to check air conditioner odor:
Turn on the left and right zone air conditioners to a maximum of 28 degrees.
When the engine water temperature is normal, the air conditioning outlet is barely warm. The wind blowing out from the blower is very fast, indicating that the air conditioning pipeline is not blocked. The smell blowing out of the air outlet is disgusting. Fat Brother doesn't feel like the smell of dead mice, but like the smell of mouse urine.
Removing the air conditioning filter, Fat Brother smelled it with his nose and found no odor. Fat Brother wondered if a mouse had peed into the blower or evaporator.
Remove the blower and inspect it.
The fat brother continued to smell the blower and found no peculiar smell.
Use the endoscope to check the evaporation box to see if there is any treasure inside.
The evaporator box is very clean and no abnormalities were found.
Pang Brother’s summary: No abnormality was found from the air filter inlet to the evaporator box. Fat Brother suspected that there was an odor in the pipeline behind the evaporator box. In addition to air conditioner problems, you can only try using professional air conditioner cleaning agents. There is no other good way.
Check steps for hot air not hot:
If the warm air is not hot, the first step is to check whether the warm air pipe on the firewall is hot. If the inlet and outlet water pipes are not hot, then the You have to consider the water circulation is not good. For high-end models such as BMW and Audi, manufacturers will design an electromagnetic valve or water pump on the heating water pipe. The purpose is to prevent hot water from entering the heating water tank when the air conditioner is turned on for cooling, and to prevent the air duct baffle from leaking out and affecting cooling. , and secondly, it is also used in conjunction with automatic air conditioning.
For example, there is an electronic water pump on the heater water pipe of this X1. If the water pump does not rotate, the heater will not heat up.
To check, you can touch the water pump with your hand and feel if there is any slight vibration in the water pump. Fat Brother checked that the water pump has a vibration. If you can't feel it, you can also unplug the plug cord at the back of the water pump and try again.
Unplug the plug and use a test light to test whether there is power. After checking, the power supply to the water pump is normal.
Since the water pump is working, why is it not hot yet? At this time, Fatty needs to consider whether the pipeline is blocked or there is air in the pipeline causing air blockage.
Unplugging the water pump pipe to check, Fat Brother was surprised to find something inside the water pipe.
Take it out and see what treasure it is.
Why are there plastic bags in the water pipes? Whose masterpiece is this?
What is the operation of stuffing something in the heating pipe? Is the air conditioner not cold, or is the heater too hot?
The temperature is adjusted to a maximum of 28 degrees. At this time, the air outlet is so hot and the wind is really hot. Fat Brother also cleaned the air conditioning pipes, and the smell is no longer bad.
Pang Ge’s summary: For this repair, Pang Ge only used a bottle of air conditioning cleaning agent, and the rest was basically labor costs.
This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.