Why the air conditioner does not work on heat and how to fix the problem

The air conditioner does not work for heating, and it is cold and damp outside - this is a real problem for residents. Most often, the opportunity to warm the air is used during the off-season, when the cold has already come, and the central heating is not yet working. In terms of efficiency, heating by an air conditioner significantly exceeds all existing heat sources, because the air is blown out by powerful fans, so it cannot be said that the air conditioner does not heat. Heating is carried out quickly and at a lower cost.

The air conditioner does not heat: severe frost

When the air conditioner does not heat up in freezing weather, the problem is not with the hardware. He simply has nowhere to get a lot of heat. This is due to the principle of operation of the compressor and does not mean a breakdown of the air conditioner. No more than 3 degrees will be added to the room temperature. The most effective heating is provided at temperatures from 0 to +5 degrees of atmospheric air.

Most of the models are designed to work with heating up to -10 degrees, some function even at -20.

Heat does not go: valve broken

If the air conditioner does not operate on heat, but at the same time blows from the indoor module, and the compressor is running, the reason may be a breakdown of the four-way valve. This valve is very important, it is responsible for the transition from the "winter" mode to the "summer" mode and vice versa.

When the air conditioner is not running on heat, the compressor does not start when power is applied, but an air jet is blowing from the indoor unit, the problem is probably in the compressor. It needs to be repaired or changed.

The air conditioner does not heat: defrosting is stuck

When the air conditioner does not work for heating, but the cooling mode is operating normally, blowing from the indoor unit, the reason may be hidden in the absence of a defrosting option or its violation.

Do not hurry!

Sometimes in frosty weather, the air conditioner does not work for heating when the power is turned on. The indication shows that the system is working normally, the fan does not start - this may mean that the indoor unit is warming up. It takes about 15 minutes to raise the temperature. In addition, the device needs time to tune in to work in the new mode. The secret is that the refrigerant flows in the opposite direction during heating. The system may not regulate pressure well, so the air conditioner does not run on heat. No need to turn off equipment or do anything. Just wait. In some cases, the display may even show an error code. Also, do not rush. Even the red indicator on the scoreboard does not indicate problems.