How to Fix a Broken Water Heat Pump

fixing heating system
  • 1-3 hours
  • Intermediate
  • 100-500
What You'll Need
New filter
SAE-10 Oil

A water heat pump, sometimes known as a water-to-water heat pump, uses water to regulate temperature. The water carries the heat through the system, heating the room, or providing air conditioning, depending upon the time of year that it is being used. Under-floor heating, some radiators, and water tanks can all use the source provided by a hot water pump, but these devices are often used to heat outdoor swimming pools, or for saunas and Jacuzzis. Heat pumps are often more efficient than a boiler, although they do not reach as high a temperature as the latter. If you consider that your heat pump is not providing the same amount of hot water that it did previously, or the pump is obviously not working, there are a number of ways to fix the problem.

Step 1 - Check the Filter

Before you take off the pump and replace it, there are a number of quick fixes that can really make a difference to your water heat pump. First, you can check and replace the filter of the system. Filters serve to keep debris and grease out of the system, but as a consequence they can become clogged with dirt themselves, and prevent water or air from flowing through them efficiently. In a water heat pump, this can prevent the circulation of water, meaning that heat is not provided to your system effectively. Take the door off of the blower compartment, using your screwdriver, and then remove the filter. You can either clean this and replace it once dry, or you can use an entirely new filter if you choose.

Step 2 - Clean the Pipes

Use a vacuum cleaner to clean the outside of the pipework and the motor which runs the pump. The dirt can get trapped between the belt shaft and the mechanism, preventing the pump from working and can also clog up the motor. While you are vacuuming it, check the belt for symptoms of wear and tear. Belts can become frayed through the constant motion over time, and you may find that replacing the belt is the best way to get your system working again.

Step 3 - Provide Lubrication

You may have thought that the water flowing through the pipes would provide enough lubrication for the motor, but as with all mechanical items, they can become stiff surprisingly quickly. A drop of SAE-10 oil into the lubrication holes on your motor will help keep the wheels inside turning. If your motor has not had oil added for a long time, you may find that it has completely shut down, and does not work. If this is the case, you will need to remove the motor from the housing, take off all of the parts, clean them and then reassemble the motor.