Role of an actuator motor in a boiler
The actuator in a boiler plays an important role with the heating system as it controls the flow of fluids and gases within the system. When an actuator fault develops, it can result in loss of hot water and heating in the system, or the boiler shutting off entirely as a safety mechanism. In this post, we break down the function of a boiler actuator and what you need to know about actuator motor faults.
What is an actuator motor in a boiler?
Most boilers contain an actuator motor which is responsible for controlling when the valves within the system open. It also has control over other components which perform actions based on input or environment-based signals, such as dampers. This means the actuator motor can be activated by commands that are keyed into the boiler display manually, as well as fulfil temperature changes based on a minimum set temperature for the property at a certain time.
Functions of a boiler actuator motor
The primary function of the actuator motor is to control the opening and closing of valves within the boiler system. For instance, this boiler part can alter the position of a boiler gas valve to ensure the right amount of fuel is flowing to the burner. Similarly, the actuator will also control the combustion process by dictating how much air reaches the burner through the adjustment of the dampers.
Through changing the positions of the valves in the system, the actuator motor is by-extension responsible for controlling temperature output. However, in modern boilers the actuator will also control the position of diverter valves and mixers for more accurate temperature adjustment.
The actuator motor in the boiler may be involved in valves that release built up pressure or allow pressure to build up when re-pressurisation is required. This can be particularly important in cases when the boiler has been switched off for a long period of time, or the heating system has been flushed.
Oftentimes, valves are signalled to need to shut when potentially dangerous conditions are detected within the system. The actuator is needed to carry out this action, so it’s important that any issue that prevents it from receiving signals is fixed immediately.
The actuator motor helps to ensure that a range of valves and other important components are operating as they should. This cuts out unnecessary energy use and improves the overall efficiency of the boiler. Performance efficiency will save you money on your heating bill.
How to recognise a boiler actuator fault
The actuator motor is an electrical component which can develop faults due to wear and tear, or localised damage such as from exposure to water. A defective boiler actuator motor can be indicated by any of the symptoms below. Although a gas safe engineer will have to investigate inside the boiler unit to confirm if this is the case.
- Lack of hot water
- Hot water but no central heating
- Lukewarm tap water
- Leaks
UK boiler parts and spares
While the exact role of an actuator can vary from boiler to boiler, it nevertheless needs to be maintained to ensure the functionality of the property’s heating system. Our spare parts for boilers include brand new and expertly refurbished components for parts such as actuators. These can all then be delivered in a matter of days for replacement, to allow you to heat your home consistently and effectively. Contact National Boiler Spares.