What does a high limit thermostat do in a boiler?
A high limit switch, or aquastat, is located on the thermostat of a boiler. When it detects that the water is too hot, or that there is too much hot water pressure, it will shut off the power to the heating element and the boiler will stop producing heat.
Why does my boiler keep overheating?
Why do boilers overheat? Typically, boilers overheat due to the failure of safety controls that maintain the gas and water supply, the temperature and the pressure. When boilers begin to overheat, the internal components of the boiler are put under immense stress and are likely to suffer from irreparable damage.
What temperature should I have my boiler set at?
If you have a conventional boiler system, your water cylinder will have its own thermostat. This is usually fitted on the side of the tank. You should set the temperature between 60 and 65 °C but for maximum efficiency, it should be set to around 60 °C.
What should a boiler high limit be set at?
Most boiler manufacturers pre-set the high temperature limits on their boilers within this 180- to 200-degree range.
What is the high limit on a boiler?
Single Acting Boiler Temperature Control The high limit setting is the maximum temperature the boiler can attain. When the high limit set point is reached the burner turns off. The high limit differential setting is approximately 10° less than the high limit setting.
What temperature should heating be on boiler?
Your boiler controls explained To maximise efficiency, we recommend setting your radiator dial to 75 degrees and your hot water to 60 degrees. Once you’ve got your boiler running at the optimal temperature, you’ll want to set the timer for when you need heating the most.
Why is the high limit switch tripping?
The high limit switch has a flame sensor rod that detects air temperatures in the plenum of the furnace. If it is dirty, it cannot properly detect temperatures, which is one reason why the furnace high limit switch trips.
