Why Won’t My Air Conditioner Heat Up?

Person adjusting a wall thermostat temperature

These are questions asked by many people for the maintenance and protection especially at https://climatecontrolexperts.com/air-conditioning/ and they include:

I Put My Air Conditioner On Heat, And No Hot Air Comes Out.

Many people ask us this question, but there is no need to be alarmed since the machine needs a few minutes to start ventilating (in heat mode).

The usual thing is to wait 3 to 6 minutes for it to start blowing hot air. If after that time you still do not ventilate, then you may have another problem.

Putting My A / C On Heat Freezes The Outdoor Unit.

This can be due to various causes. The most common may be a lack of gas caused by a leak, and the most common symptom is ice or frost forming on the rear of the outdoor unit.

If your computer shows these symptoms, we recommend seeing this article on what causes an air conditioner to freeze.

Among the most common causes of frostbite are:

  • Lack of gas.
  • Fan failure.
  • Excessive cold outside (causes the unit to defrost).
  • Dirty filters.
  • Dirty or clogged condenser.

When I Put My Equipment On Heat, The Outdoor Fan Does Not Work.

There may be a problem with the start capacitor or capacitor, causing the fan not to move. To solve it, change that part.

It could also be due to a fan motor problem, and the fan is completely stuck. The solution here would be to replace it with a new one.

When the fan does not rotate in some equipment, it can also be a sign of a lack of gas since as the outdoor unit cannot evaporate, the fan does not start running. To verify this, we need to check the gas pressures.

The Compressor Does Not Work.

When this happens, we may not realize it because the first thing we do to verify its operation is to see if the outdoor unit is working, and the first thing we look at is whether the fan is spinning.

Just because the fan is spinning does not mean that the compressor is running. To check it, we will have to look at the machine’s noise or touch the connection nuts to see if they are hot.

If we verify that it does not work, it may be that:

  • The starting capacitor or capacitor is damaged and needs to be replaced.
  • If the machine has suffered a lack of gas, the compressor may have seized when running without refrigerant.
  • It may be that for some reason, the compressor has overheated and has activated its safety system (clixon).
  • If we have the outdoor unit higher than the indoor unit, it is also usually a reason for the compressor to flu since the oil it contains for lubrication tends to go to the lowest part of the circuit. So that this does not happen, we need to place siphons in the suction line.