18 boiler parts
- Pressure gaugeTechnician job
The pressure gauge is the dial (or the bar reading on a digital screen) on the front or underside of a sealed-system boiler.
0 related codes
- Water pressure sensorTechnician job
The water pressure sensor sits on the heating pipework inside the boiler casing.
11 related codes
- Expansion vesselTechnician job
The expansion vessel is a round steel tank mounted inside the boiler or on the pipework beside it.
6 related codes
- Pressure relief valveTechnician job
The pressure relief valve is a spring-loaded safety valve inside the boiler, connected to a copper discharge pipe that runs out through the wall.
4 related codes
- Filling loopTechnician job
The filling loop connects the mains cold water supply to the heating circuit so you can put back pressure the system has lost.
4 related codes
- Condensate pipe and trapTechnician job
Condensing boilers wring extra heat out of the flue gases, and that turns water vapor into a liquid called condensate that's mildly corrosive to metal.
7 related codes
- Ignition electrode and spark generatorTechnician job
The ignition electrode is a pair of metal pins (or one pin and the burner) set in a ceramic holder right at the burner face.
8 related codes
- Flame sensor (flame detection electrode)Technician job
The flame sensor is a metal rod held in a ceramic insulator so its tip sits in the burner flame.
8 related codes
- Gas valve and injectorTechnician job
The gas valve is the electrically controlled block where the gas pipe enters the boiler.
10 related codes
- Combustion fanTechnician job
The fan sits on top of or beside the burner inside the sealed combustion box.
2 related codes
- Circulating pumpTechnician job
The pump moves heating water from the boiler around the radiators (or the hot water cylinder) and back.
9 related codes
- Diverter valveTechnician job
A combi boiler has a diverter valve built in because it heats tap water on demand instead of storing it.
2 related codes
- Plate heat exchangerTechnician job
Combis heat your tap water through a compact stack of thin metal plates fitted low down in the boiler.
0 related codes
- Primary heat exchangerTechnician job
The primary heat exchanger is the metal block or coil that the burner fires into.
0 related codes
- NTC thermistor (temperature sensor)Technician job
Boilers measure water temperature with small NTC thermistors clipped or screwed onto the pipes inside the casing.
10 related codes
- Overheat thermostat and safety cut-outsTechnician job
These are the last line of protection if the normal controls fail.
3 related codes
- PCB (main control board)Technician job
The PCB is the boiler's brain, a circuit board in a plastic housing behind the front controls.
23 related codes
- FlueTechnician job
The flue is the twin-wall pipe that runs from the top of the boiler out through a wall or roof.
5 related codes