It happens that with the onset of cold weather, when the heating has not yet turned on, the air conditioner does not blow for heating and does not start in warm air mode. The reasons can be different: from simple ones that can be eliminated on your own, to complex ones that require calling specialists.

Diagnosing the Problem: Steps to Determine the Cause of No Warm Air

Insufficient airflow and failure to warm up should not immediately cause panic. Failure varies widely: in some cases it signals a serious malfunction of the equipment, in others it signals a minor problem that can be solved on your own.
Basic steps for troubleshooting:

1. Check whether the air conditioner has a heating function.
2. Determine whether the remote control is working correctly.
3. Switch the operating mode from cooling to heating. It may take 15 minutes to start this option when changing modes if the device does not have a hot start function.
4. Find out the exact outside temperature. Most air conditioners can work to heat a room if the outside temperature is not lower than -5 °C. Inverter models can withstand frost down to -15 °C.
5. Inspect the external unit. If the defrosting mode is violated, ice and icicles build up on the unit, interfering with proper operation.
6. Determine if there is a freon deficiency. If there is not enough refrigerant, the warm air mode on the air conditioner does not turn on.
7. Eliminate the possibility of failure of the four-way valve. This is a serious defect that is diagnosed by specialists. Repair work in this case is unreasonably expensive and involves complex soldering. Their cost can be more than half the price of a new split system.
8. Diagnose the operation of the indoor unit fan. Air conditioning service technicians will help you perform this check.

There are frequent cases of incorrect operation due to heavy contamination. The filters of the indoor unit can be cleaned and washed yourself. But to flush the components of the external unit, you will need professional help.

Repair yourself: instructions for troubleshooting an air conditioner that does not blow warm air

If your air conditioner does not have a heating function, you can replace it with a modern model. A new remote control can be purchased on the manufacturer’s website or at diagnostic centers.

Impatient users need to wait for the time specified in the instructions for the equipment to adjust to the desired mode. In this case, you should always take into account the temperature outside and do not try to start the device in severe frost.

When do you need air conditioner repair technicians?

In all other cases described above. If you notice a large amount of ice on the outdoor unit, then there is a problem with defrosting. The air conditioner needs professional help from specialists who will understand the reason for the incorrect operation of the automation. Although there are times when an industrial hair dryer or temporarily switching the mode to cooling will help out.

A lack of freon is indicated by the appearance of smudges on the blocks. On the inside, frost most often appears, so the air conditioner does not blow warm air. The problem is solved by topping up the refrigerant.

If the four-way valve is damaged due to a manufacturing defect, in warranty cases it will be replaced free of charge by the manufacturer. If this is due to contamination, then expensive repairs or the purchase of a new part will be necessary. If the fan fails, it is replaced with an analogue by specialists installing and repairing air conditioners.

Restoring Your Air Conditioner: Preventative Maintenance Tips

Household appliances need timely prevention. Experts advise that when you start actively using the air conditioner, you invite specialists who will diagnose the equipment.

Specialists will be able to recognize the problem at the very beginning and replace worn-out components, parts, filters, and tubes in a timely manner. If maintenance is carried out on a regular basis, and you comply with the manufacturer’s operating requirements, then the air conditioner or split system will serve flawlessly for many years. And the question: why the air conditioner does not blow cold or warm air will disappear.