What are the reasons why an air conditioner can cool but not heat

The reason why the air conditioner only cools and does not heat - improper use.

There is too much dust accumulation in the air filter, and the vents of the inner and outer units are blocked by foreign objects. The function of the filter screen is to adsorb the dust in the air, if the accumulated dust is too much and not cleaned in time, the air circulation will be blocked, resulting in a decrease in the air outlet volume, resulting in the heat production in the machine can not be brought out by the flowing air in time, resulting in insufficient heating production, this is not a fault, it belongs to the maintenance of the air conditioner, just take off the air filter regularly to clean, it can be restored to normal, generally every half a month to clean the filter screen is more suitable (pay attention not to use more than 40 hot water to clean when cleaning, do not use washing powder, dish soap, Gasoline, banana water, etc., so as not to deform the filter, and can not be dried with an open flame); If the dust scale of the evaporator and condenser is too thick, the heat exchange effect will be reduced, resulting in a decrease in heating capacity and an increase in power consumption; The heating temperature is set too low; The door cracks and wall holes in the air-conditioned room are not blocked, or the windows and doors are opened frequently, resulting in indoor heat loss.

The reason why the air conditioner only cools and does not heat - environmental factors.

Heating and cooling air conditioner is divided into heat pump type, heat pump auxiliary electric heating type and electric heating type three products, under the same condition of heating production, the first two power consumption is about half smaller than the third kind, considering the power supply capacity and electricity cost, the first two types of air conditioning are generally selected by families now (but attention should be paid to their use conditions, the first two are only suitable for the environment above minus 5, obviously not applicable to the northern region). Heat pump air conditioner, the ambient temperature is too low when heating, the energy efficiency ratio of the air conditioner is also reduced, and the heating effect is not ideal in the colder winter, which is a normal phenomenon. For heat pump air conditioners without automatic defrosting, the minimum ambient temperature it uses is minus 5, below which it will not heat or the effect is very poor, because the frost on the external heat exchanger blocks the air flow and can no longer suck in heat from the outside; For heat pump air conditioners with automatic defrosting, the minimum ambient temperature used is also minus 5, below which it is not effective for heating.

The reason why the air conditioner does not heat up:

1. Lack of fluoride. 2. The air outlet of the internal machine is not smooth, and the filter needs to be cleaned.

3. The four-way valve is slightly drained.

4. There is a problem with the extra capillary or single valve for heating.

5. The efficiency of the compressor is reduced due to aging.

6. The outdoor temperature is low or the humidity is high, resulting in the reduction of the efficiency of the air conditioner itself.

7. The auxiliary electric heating is not started.

For details, please call us or make an appointment for maintenance.

The air conditioner can be heated, but the reasons for not cooling are as follows, first check whether the electromagnetic reversing valve of the outdoor unit of the air conditioner is stuck, you can use a screwdriver to gently tap a few times, and then turn on the machine to try, in fact, it is whether the temperature sensor of the indoor unit of the air conditioner is abnormal.

The main board of the internal unit, or because the four-way valve of the external unit is not reversed, the internal unit, the motherboard, and the relay are damaged or directly adhered to, which will lead to the heating of the air conditioner and not refrigeration.

4. Poor remote control or air conditioner receiver. (It is manifested as no response from the air conditioner when it is turned on, or it does not work from time to time).

5. Four-way valve (single chiller does not have this fault) or compressor high and low pressure string, air conditioning works but has no effect. (The phenomenon is the same as the first).

6. The control panel of the internal or external unit of the air conditioner is faulty, resulting in the air conditioner not being refrigerated. (Manifested as no reflection when turned on or the air conditioner is messy).

7. The zero live wire of the air conditioner power supply is reversed. (This failure occurs in a small number of air conditioners, usually at the time of installation).

8. The internal or external fan is damaged (the capacitor is more broken), and the external fan is damaged by the high exhaust temperature or high voltage protection. If the internal fan is bad, the internal machine is frosty, the external unit has been working, and the internal machine has moisture into the device.

The following points need to be checked when the air conditioner is not cooling:

1. Whether there is a refrigerant in the system, if not, it needs to be pressurized to check the leakage, and then add enough.

2. If there is refrigerant, check whether the compressor is working. If it is not working, you need to check whether there is any problem with the air conditioner pressure switch, temperature control switch and its wiring.

3. Check the heat dissipation of the air conditioner to see if the fan is working. Clean the condenser.

4. Replace the air conditioner filter, the filter element is too dirty, and it will also cause no refrigeration.

In summer, almost every family uses air conditioning, and the frequency of air conditioning is very high, so it is more and more common for air conditioning to have problems, and some air conditioners even go on strike. For example, some air conditioners can make heat, but cooling cannot, which is undoubtedly more painful in summer. What happens when an air conditioner can only heat but not cool?

The solution to the poor cooling effect of the air conditioner?

In summer, almost every family uses air conditioning, and the frequency of air conditioning is very high, so it is more and more common for air conditioning to have problems, and some air conditioners even go on strike. For example, some air conditioners can make heat, but cooling cannot, which is undoubtedly more painful in summer. However, what is going on with the air conditioner can only heat and not cool, which is unclear to many people, and next, I will tell you about the reasons and the solution to the poor cooling effect of the air conditioner.

What happens when an air conditioner can only heat but not cool? The solution to the poor cooling effect of the air conditioner?

What happens when an air conditioner can only heat but not cool?

1. The damage rate of the internal heat exchanger coil temperature sensor is relatively high, even if it is not broken, the failure rate detected by it is relatively high. So if you think there may be a problem with the sensor, you may want to check it and replace it. Poor contact of the connectors of the air conditioner is also one of the causes of frequent failures.

2. Lack of fluorine is also a common fault, in the case of protection after the air conditioner works for a period of time, the first thing should be checked whether the refrigeration effect is good, if it is not good, the three pressures of the air conditioner must be measured, the balance pressure and low pressure of refrigeration are measured, and the balance pressure and high pressure are measured for heating.

3. The problem of voltage is also very prominent, especially the peak of electricity consumption. For the three-phase air conditioner that cannot be started, the first check object is the phase sequence. The focus of the air conditioning power supply inspection is whether the contacts (air conditioner and the main power switch) are fire and ablation, the contact is poor, whether the internal contact of the main power switch is good, whether the current resistance is satisfied, whether the main power cord is too long and thin, and whether the voltage is lower than 200V.

Whether the neutral wire and the ground wire are mixed, whether the phase wire and the neutral wire of the three-phase are mixed, etc.

4. Pressure protection, especially when the heat dissipation outside the refrigeration room is not good in summer. Compressor overload protection, common in summer when temperatures are high and electricity peaks are common. The remote control receiver and display board circuitry is also prone to faults, and voltage measurement and substitution are preferred.

For places with poor environment. It is necessary to check whether the internal and external connections and indoor wires are bitten by rats, which is a more frequent fault, as well as whether the circuit board and buttons are wet. There are lengthened pipelines and lines between the internal and external machines, and the joints are also the multiple points of failure, and the requirements of the wire joints are to be wrapped with waterproof insulating tape after welding, and some installers are just screwed together with ordinary tape.

What happens when an air conditioner can only heat but not cool? The solution to the poor cooling effect of the air conditioner?

What should I do if the air conditioner does not refrigerate well?

1. If you have a problem with the temperature setting of the air conditioner, you can set the temperature with the remote control, and it is recommended to set the temperature when cooling: 26 to 28 degrees Celsius. If there is a lack of air conditioning refrigerant (freon), you can find an after-sales service person to check and add it. Compressor problems can only be entered by professionals.

You should check this situation.

1. Whether the connecting line of the internal and external machine is accurate.

2. Whether the four-way valve is stuck.

To test whether the four-way valve is stuck, you can pull the four-way valve coil from the terminal board, because the four-way valve is refrigerated when it is not energized. You can take the power on and switch to the four-way valve in the power-on state, or knock the four-way valve body with a wooden stick to see if it can be reset, and it can be refrigerated if it is reset, but this kind of jamming may still occur, and it can only be solved by replacing the valve body.

It should be caused by abnormal performance of the control circuit, or the four-way valve is stuck in the absence of return.

It is recommended to contact after-sales service or ask a professional for maintenance.

The voltage of the power supply is not enough, and it often cannot reach the normal voltage, especially during the peak of electricity consumption.

Ice deficiency in air conditioners can also cause this phenomenon.

If an air conditioner is used well, and his sudden heating is not cooling, it may be a problem with the four-way valve in the air conditioner, so it is good to find out and replace it with one in **?

The air conditioner does not cool but can heat the first reason:

Check whether the air conditioner is connected wrong when wiring, which will lead to the situation that the air conditioner can only heat up and cannot be cooled normally, then you must ask a professional maintenance master to check and repair, do not operate it easily, if not, check whether the mode of the air conditioner has not been changed, use the remote control to change the mode to try, and adjust to the correct refrigeration mode.

The air conditioner does not cool but can heat the second reason:

If the air conditioner is used frequently and is not checked regularly, it is very likely that the internal parts of the air conditioner are faulty, check whether the solenoid valve of the air conditioner is normal, if the solenoid valve of the air conditioner is damaged, such as the problem caused by the mechanical failure of the four-way valve switch of the air conditioner, it is recommended to ask a professional master to replace it again.

The air conditioner does not cool but can heat the third reason:

Check whether the refrigerant of the air conditioner is sufficient, or the refrigerant caused by leakage is insufficient, so that the air conditioner is not refrigerated, such a situation generally appears in the air conditioner that has been used for several years, because the air conditioner needs sufficient support for refrigeration, so find a professional master to check what the refrigerant is caused by the shortage, if it is a leak, add an appropriate amount of refrigerant after maintenance.

The above are the reasons why the air conditioner does not cool but can make heat, I hope it will help you.

Freon may be lacking and can be de-fluoridated.

One of the reasons why the air conditioner does not refrigerate: freon is not enough (commonly known as "refrigerant" is not enough) when the ambient temperature is about 35 degrees Celsius 1, low pressure and high pressure 3, static pressure This is a normal situation, generally appearing in the old air conditioner that has been used for three to four years. The air conditioner did not completely stop cooling, but the effect of cooling decreased.

This is because old air conditioners use freon as a refrigerant, which will volatilize after long-term use. Therefore, users only need to add a little to the regular air conditioning maintenance point. In addition, it is not excluded that improper installation can cause freon leakage and problems with the machine itself.

2. The second reason why the air conditioner does not refrigerate: the power supply voltage is not enough.

3. The normal starting voltage of the air conditioner is 220V+-10%. In China's power supply system with a phase voltage of 220V and a line voltage of 380V, almost all compressors above 200V can be started. At 180V or more, 70-80 can be started, and at 160V or more, only a few can be started.

I've done it myself. Below 160V there is almost no possibility of starting. As a rule of thumb, the compressor starting voltage is more reliable above 190V.

4. The third reason why the air conditioner does not refrigerate: the power of the air conditioner is not enough.

The general selection principle is: 150-250W square meters for cooling and 250-350W square meters for heating, in addition to comprehensive consideration of factors such as space height, level orientation, sealing performance and residential population.

For the sake of wealth treasure drinking in general.

The reasons why an air conditioner only cools and does not heat are as follows:

1.The air filter has too much dust, and the vents of the internal and external units are blocked by foreign objects, resulting in a reduction in the air outlet volume, resulting in insufficient heating production, which is not a fault, it is a maintenance problem of the air conditioner, and it can be restored to normal as long as the air filter is removed regularly for cleaning, and it is generally more appropriate to clean the filter once every half a month.

2.Environmental factors. Heating and cooling air conditioner is divided into heat pump type, heat pump auxiliary electric heating type and electric heating type, under the condition of equal heating, the first two power consumption is about half smaller than the third kind, considering the power supply capacity and electricity cost, the first two types of air conditioners are generally chosen by families now, but attention should be paid to their use conditions.

3.Refrigerants.

Insufficient. Due to the leakage of the refrigeration system, the refrigerant involved in the thermal cycle in the system is insufficient, resulting in a decrease in heat exchange efficiency, resulting in insufficient heat production. If there is such a fault, the system will produce heat and cool the cooling capacity.

are insufficient phenomena, at this time access to the pressure gauge.

Measure the pressure of the system, and find that the pressure is significantly lower than normal, and then check the pipeline.

1.First of all, you must make sure that your air conditioner is a dual-system (cooling and heating), that is, the KFR model, which is dual-purpose to talk about sails, 2The mode settings should be correct, and it should be noted that the heating will not be generated in the summer or when the ambient temperature is higher than the set temperature (i.e. the heating mode should only be run in the winter).

3.If the air conditioner is a dual system, and the setting is correct, it can be cooled but not heated, it means that there is a problem with the four-way reversing valve, then you need to find a professional maintenance personnel to repair or replace.

The air conditioner can be cooled but not heated, which is caused by the four-way solenoid valve of the outdoor unit not working, check whether the four-way valve coil is damaged and whether the coil power supply is normal.

It can only be cooled in hot days, and can only be heated in winters with hail.

1. Temperature setting. 2.The temperature sensor resistance is reduced. Replacement. 3.In summer, the room temperature should be lowered before trying to heat it. Set the maximum temperature. 4.

The heat pump reversing valve does not operate. Find out why. 0k！

The air conditioner that is not a heat pump test cannot be heated, if so, check whether the four-way valve is working.

If the solenoid valve does not reverse, it may be that the main control board or solenoid valve is broken, and then the air conditioner does not support heating.

The four-way defeat valve is broken, looking for after-sales.