Starting up a boiler after summer is over involves critical maintenance checks to ensure reliability, energy-efficiency and safe operation all winter long. Because home boilers utilize flammable natural gas, high-temperature burners, and may produce dangerous combustion byproducts like carbon monoxide gas, the recommended annual maintenance at startup is not a do-it-yourself procedure. Scheduling seasonal boiler startup with your HVAC contractor allows a qualified heating technician to inspect the entire system and perform basic boiler preventive maintenance. Then, he will start the system, make vital safety checks and verify proper operation.

Here are some of the items on the professional’s checklist for starting up a boiler after summer:

  • Perform a visual evaluation of the tank, cold water supply line, hot water outlet line, and all connections for signs of deterioration or water leaks.
  • Examine the gas supply line and connections for any evidence of leaks or damage.
  • Drain the boiler tank to remove mineral sediment and refill.
  • Check the condition of the boiler vent pipe and ensure that it is intact and unobstructed all the way to the exterior of the house.
  • Remove the main gas burners, clean and re-install. Also clean the boiler pilot light assembly or verify proper operation of the electronic igniter.
  • Lubricate the circulation pump motor.
  • Start the system and observe the burner flame for proper color and height.
  • Once the system is at operating temperature, verify that water temperature and system pressure conform to manufacturer’s specs.
  • Check the pressure charge in the expansion tank. Drain excess water if required and/or recharge with air if necessary.
  • Inspect pressure relief valves for leakage and test for proper operation.
  • Bleed air from all radiators in the house at individual bleed screws.

For more information and to schedule professional service for starting up a boiler after summer, in greater Cincinnati, contact Apollo Home Heating, Cooling and Plumbing.