How to Power Flush Your Central Heating System

A heating system.
  • 2 hours
  • Beginner
  • 50
What You'll Need
Power flush machine
Central heating unit
Rust remover

On occasion, your central heating system needs to be flushed in order to maintain its proper working order. This process helps to remove sludge and any other type of build up that can occur through the normal operation of your heating system. The corrosion that occurs inside your central heating system, which is a black iron oxide sludge, happens naturally and if not addressed will lead to the failure of internal parts. This build up also greatly reduces the efficiency of your central heating system.

Step 1 - Rent a Power Flush Machine

You will need to rent a power flush machine for use with your central heating system. The machine should be compatible with the type of system that you own. You can check with the manufacturer of your heating unit to find out if there is a power flush machine that is recommended.

You will need to call around different retailers and rental agencies in your community to locate the power flush machine. It may be possible to contact a heating and air conditioning repair and service center for information on a power flush machine that they have available for the purpose of flushing your central heating system.

Step 2 - Add Rust Remover

Before you connect the power flush machine to the central heating system you need to add the rust remover solution to the machine with water. The rust remover works like a magnet to attract the black iron oxide while the machine is in operation. The rust remover should be added in accordance with the instructions provided by the power flush machine's manufacturer.

Step 3 - Connect the Power Flush Machine

Take the power flush machine and connect it to your central heating system unit. The machine will connect to the radiator and when turned on and blow water through the central heating unit. Make sure that the power flush machine is properly connected before proceeding on to the next step.

Step 4 - Flush the Central Heating Unit

With the power flush machine properly connected to the central heating unit, turn the machine on and allow it to operate. The flush process will work to clean all of the black iron oxide that resides throughout the central heating unit, cleaning the radiator, heating coils, and all of the pipes. As the individual components are cleaned, the rust remover solution will attract the black iron oxide and leave the inside of your central heating unit clean and ready for operation. The pH meter on the power flush machine should indicate a neutral reading when the power flush has completed.

Step 5 - Remove Power Flush Machine

Once the pH meter reads neutral, indicating the removal of the sludge, disconnect the power flush machine. Turn the central heating unit on and allow it to run for up to an hour in order to restore the system to its proper working order.