What's wrong with the air conditioning heating not starting?

The reasons why the air conditioner is not hot are: insufficient refrigerant, four-way valve failure, low outdoor temperature and clogged filter screen.

1, insufficient refrigerant

Many people think that air conditioners only use refrigerants in cooling mode, but in fact, air conditioners also need refrigerants when heating. Therefore, in the absence of refrigerant, the system will have insufficient heating, so there will be a feeling that heating is not hot. At this time, just ask someone to come to the door to replenish the refrigerant.

2. Four-way valve failure

The four-way valve of air conditioner is the key link to control the conversion of refrigeration and heating. When it fails, such as air leakage, it will reduce the refrigerant involved in heat exchange, resulting in low heat exchange efficiency, and you will naturally feel that the air conditioner is not effective when heating.

The outdoor temperature is too low.

The outdoor unit of air conditioner is generally installed outdoors. When the outside temperature is too low, it will produce frost and block the heat exchanger where the air flows, thus affecting the heating effect of the air conditioner. And if the temperature is below MINUS fifteen degrees, most air conditioners can't work normally.

4. The filter screen is blocked

It can be said that the air outlets of most air conditioners have filters to filter dust and bacteria. When these sundries accumulate too much, the air outlet will be blocked, and the hot air generated by air conditioning heating will naturally not be discharged, and you will feel that air conditioning heating is ineffective.

Optimum temperature of air conditioning heating

1, heating setting temperature: 20℃

It will be very comfortable to adjust the heating temperature of air conditioner to 20℃ in winter. If the heating temperature is set too high, the indoor air will be extremely dry, which is not conducive to health and the air conditioner may be overloaded.

2. Heating ambient temperature: 7℃

It is so cold in winter that it is even below 0℃ in some places. The outdoor unit of air conditioner is easy to frost or freeze, so it must be defrosted constantly, so the load of air conditioner will increase and heating will be slower.

The investigation shows that when the outdoor temperature is 7℃, the heating effect will decrease with the decrease of temperature, and when it is as low as -5℃, the air conditioner has basically no heating effect. But if the inverter air conditioner is used, the temperature will work above-15℃.