1, bell mouth: the bell mouth is the copper pipe at the joint of the internal and external machines. The cost is a few dollars, the market price is tens of dollars, and many masters talk about more than one hundred.
2, change the capacitor: the air conditioning refrigeration effect at home is not good, the master came to the door and said that the capacitor is broken, and it needs hundreds of changes. In fact, the cost price is only tens of dollars.
3. Cleaning the external machine: One of the traps of cleaning and maintaining air conditioners in Chongqing is cleaning the external machine. Generally speaking, it is enough to wash the external machine, and there is no extra charge at all, and even if it is not cleaned, it will not have much impact.
4, add pressure: a pressure is generally around forty or fifty dollars, and some masters add three pressures to tell you to add five, so be sure to keep your eyes open!
5. Hands and feet: A few masters who lack sense of responsibility and morality create an illusion of insufficient pressure when testing, and then add less pressure when adding. Secondly, there are other components such as remote control. When the customer is unprepared, the remote control is broken, and then other products are sold at a high price to collect money.
There are many traps in air conditioning cleaning and maintenance in Chongqing, which can't be done at one time. I suggest you find the seal of a regular brand.