Common Reasons Your Heat Pump Outside Unit Won’t Start

The outside unit of a heat pump plays a crucial role in the overall operation of the system, as it is responsible for transferring heat between indoor and outdoor environments.

However, encountering a situation where the heat pump’s outside unit is not running can cause concern. Without proper functioning, your heat pump may fail to provide your home’s desired heating or cooling.

Whenever your heat pump outdoor unit’s fan isn’t functioning correctly, check to see if any debris is blocking it. Be sure to look around the blades for things like twigs, nests, or pests as these might be blocking the fan blades from moving.

Be sure that the breaker for the outside unit has not been tripped in your home’s circuit box. Make sure to turn off the power before you begin cleaning.

Reconnect the system after you have removed the debris. Troubleshooting must be done at an advanced level if the problem persists.

What Could Be Making My Heat Pump Fan Not Spin When the Unit Is On?

What Could Be Making My Heat Pump Fan Not Spin When the Unit Is On

A heat pump cannot function properly without its fan. Some reasons could be the reason why it isn’t working. If debris has accumulated inside the unit and prevented the fan blades from moving, this may be one cause.

It is easily possible for the outside unit to become dirty or blocked with debris due to its location.

Make sure that the area surrounding the unit is clean to prevent this. If there are any leaves or anything else blocking the fan, remove them and trim any nearby plants.

Clean the area before turning off the power and use a stick or tool for debris removal. Make sure your fingers aren’t used. When you encounter heat pump problems, it is always recommended to seek assistance from a qualified technician.

If your heat pump system breaks down unexpectedly, you may need some help diagnosing and repairing it, which could save you lots of money. Several reasons can lead to your heat pump outside unit not working:

  • No heat or cool signal is coming from the thermostat.
  • A heat emergency has been activated on the thermostat.
  • While the heat pump is heating, it is in defrost.
  • Power-related issues.
  • Not receiving a heat or cool signal from the thermostat.
  • Ensure the thermostats are set to the desired temperature.

Test whether the heater works by adjusting the thermostat heat setting 5 degrees above the room temperature, waiting for a few minutes, and then checking whether warm air is coming from the vents.

Normally, thermostats work fine if there is warm air, but if there isn’t, that indicates that it’s not working properly.

Problems With Heat Pump Fan

Problems With Heat Pump Fan

In addition to their moving parts, heat pumps can also suffer from mechanical failures. In addition to the fan, it is important to keep an eye on what is going on with it.

When the fan is not working properly, it may indicate a more significant problem. Problems can be solved easily in some cases but require more effort in others.

Sticky Fan Motor

The fan’s motor can go bad, but the capacitor is still in good shape. A stick may be able to make the fan spin when you push it.

Be aware, however, that this is only a temporary solution. It’s best to have the motor repaired by a professional if it’s truly failing.

Dead Fan

When pushing the fan does not work, you may have a broken motor or capacitor. It will be possible for the technician to determine which part needs to be replaced to fix the problem. Getting professional assistance shouldn’t be delayed.

Additionally, make sure your heat pump fan is in working order. In contrast, if it is not replaced, the compressor can overheat, resulting in more expensive repairs.

Why Isn’t My Heat Pump or Fan Working?

Why Isn't My Heat Pump or Fan Working

The thermostat settings are the first thing to check if the heat pump and fan don’t work. There is a possibility that someone changed the settings while you were away by accident.

You should choose the correct mode and enter a reasonable temperature goal. In the next step, you should check the circuit breakers. When the thermostat is fine, there may be a problem with the power supply. Ensure the circuits are switched on.

Restart your system if your circuit breakers have tripped recently. As soon as this is completed, the heat pump should begin working. Having the breakers continue to trip is a sign that you need to call a technician to find a permanent remedy.

The Thermostat is in Emergency Heat Mode

When the thermostat is set to this mode, both the refrigeration system and electric heating elements are shut down, which shuts down the outdoor fan motor. If this is the case, reset the thermostat to normal operation.

The Compressor is Running, But the Fan is Slow

The Compressor is Running, But the Fan is Slow

There could be an issue with the capacitor or motor if the fan is running slowly. Depending on the problem, a technician can test these components and determine the solution. It is important to remember that some fans operate at more than one speed.

Two-stage fans, for instance, may run between 60% and 100%, while variable-speed fans can run between 40% and 100%. In this case, your slow fan may work as intended, and an expert opinion might be needed.

The Heat Pump is in Defrost While in Heating Mode

The heat pump’s outside unit is sometimes covered in light ice and frost during winter, but this doesn’t affect its operation. The entire unit, however, must be free of snow and ice if these materials cover it.

Extreme cold hinders the regular operation of heat pumps by preventing the heat transfer between outside air and the refrigerant. It stops the outdoor fan motor, turns on your heating elements, and also turns on the cooling system to eliminate this frost.

It can lead to system failure and may damage your heating system beyond repair. It is also possible for the ice to cause extensive damage to the fan blades and sensitive fins and even the compressor’s failure because of the coils’ ice buildup.

Power Related Problems

It is possible that your heat pump system might have tripped a circuit breaker or blown a fuse due to a power surge.

By replacing the blown fuse, this problem can be resolved quickly. Make sure you check the circuit breaker switch to see if any of the switches have flipped and then restart it.

Final Words

Please note that this guide is not a substitute for routine maintenance on your system. For your system to last longer and maintain its functionality, you should have professionals perform routine maintenance.

Furthermore, this guide can’t handle all pump problems, so consult a professional if the problem appears serious.

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