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At present, China's domestic market, an air-to-water heater (heat pump water heaters) 200L household machine price is generally more than 6,000 yuan, while a 150L home machine market price is generally between 5,000 to 55,000 yuan. Visible air to water heater expensive, relative to some wage-earners can even say that more expensive. Many consumers will question the price / performance ratio, but quite a few consumers will ask, "How long can a water heater be used?" To this end, I specifically interviewed industry-renowned brands Huatian Cheng Electric Co., Ltd.. According to the relevant person in charge of China Tiancheng introduced air to water heaters heat pump water heaters) generally up to 8 years of service life. Because the air heat pump water heater is a high degree of automation equipment, regular use of the unit status check, the unit for long-term effective maintenance and repair, unit operation reliability and service life will be unexpectedly improved. Huatian Cheng introduced the person in charge of after-sales service, in fact, the maintenance of air to water heater is mainly from the inspection started. First of all, should always check the unit's power supply and electrical system wiring is solid, the electrical components are abnormal, if timely repair and replacement. Secondly, we should always check the water system, water tank safety valve, liquid level controller and exhaust device work is normal, so as to avoid the air into the system resulting in reduced water cycle, thus affecting the unit heat and the reliability of unit operation. At the same time can not ignore the check pump, water valve is working properly, water pipes and pipe joints whether leakage. Also need to constantly check the work of the various components of the unit, check the machine pipe joints and inflatable valves for oil, to ensure that no leakage of refrigerant units. When the air source heat pump water heater actual water temperature and the unit control panel display numerical inconsistency, you can detect the temperature sensing device is in good contact. So, regular inspection of the product not only ensures its efficient and normal work, but also greatly extend the service life of the product.