Williamson boiler troubleshooting

Although modern boilers can last a lifetime, there are no perfect ones; therefore, you should be aware of the most common problems. Please, check the troubleshooting table below. Manufacturers are familiar with most of these issues, so they have developed standard troubleshooting recommendations.

Fill the system1. Close manual and automatic air vents and drain cock
2. Fill to correct system pressure. Correct pressure will vary with each installation. Normal cold water fill pressure for residential systems is 12 psig. Boiler water pH 7.0 to 8.5 is recommended.
3. Open automatic air vent (if installed) one turn
4. Starting on the lowest floor, open manual air vents one at a time until water squirts out. Close vent. Repeat with remaining vents
5. Refill to correct pressure
To place boiler in operation:1. Verify boiler is filled with water
2. Open burner door and verify rear target wall,floor and burner door insulations are in proper condition and position
3. Verify burner mounting door is closed and bolted tightly and burner plug is connected
4. Refer to burner manual for burner start-up, adjustment and checkout procedures. Factory burner adjustment and settings may not be suitable for specific job conditions
5. Check boiler and system piping for leaks
6. Inspect breeching and venting for proper operation
Boiler relief valve1. Inspect the relief valve and lift the lever to verify flow as in the following warnings, excerpted from a relief valve manufacturer’s warning label. Before operating any relief valve, ensure that it is piped with its discharge in a safe area to avoid severe scald potential.
2. After following the above warning directions, if the relief valve weeps or will not seat properly, replace the relief valve. Ensure that the reason for relief valve weeping is the valve and not over-pressurization of the system due to expansion tank waterlogging or undersizing.