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Maintenance and Service
Baxi Brazilia F8S
Balanced flue gas wall heater Baxi Brazilia F8S brocken control knob. For this particular model F8S you will need a long version of the control knob. The replacement part number is Baxi 234643 control knob assembly. To replace this part you don't need a gas engineer. In order to fit the replacement part correctly simply remove the casing by pulling it upwards. You can order it from here.
Wall heater manual: PDF
Glowworm Xtramax HE
Combination boiler Glowworm Xtramax HE with a hot water storage cylinder discharges a lot of water from the Temperature and Pressure Relief Valve (T&PRV). After I turned the power on and put a hot water demand approximately after 10 seconds when a secondary, hot water pump start working but all hot water taps are closed and water in the storage cylinder is cool the top T&PRV start discharging lots of water continuously.
- First check that the hot water expansion vessel which is located in the bottom right corner of the boiler is charged with air up to 3.5 bar. There is only one screw is holding it. Remove the cup from the nipple and press. If water start coming from the nipple then you need to replace the expansion vessel.
- If expansion vessel is OK then replace the T&PRV. The part number is 0020018589. Not many suppliers keep this in stock. It is going to be a special order which might take up to 4 working days. You can order it from here.
Boiler manual: PDF
Mira Crescent Cheltenham
Mira Crescent Cheltenham concealed thermostatic shower is constantly dripping from a shower head. The shower valve has a ceramic discs Flow Cartridge Assembly which has worn out. The part number for the flow cartridge is 441.56. To replace the cartridge you will need to isolate cold and hot water supply's. The cartridge can be ordered from here.
Trevi Therm MK2 - no hot water
The hot water is running cold from the shower. Trevi Therm thermostatic cartridge assembly (S960134NU) need replacement. To replace the cartridge you don't need to isolate water supply just close it. To dismantle the cartridge you need to undo 1 screw and remove 2 securing clips. Pull out a cartridge extension and a pressure adjustment handle. Then with a spanner unscrew the cartridge assembly from the valve. You can order the cartridge from here.
Worcester Greenstar 24i Junior - timer is not working
The boiler works fine when you put it on constantly on and if you want to turn it off but doesn't work on timer. The most likely you need to replace the mechanical timer. Turn the electricity off and remove the boilers cover. This is a very easy part to change. Unscrew one screw holding it and pull it upwards. Disconnect the wires and plug in the new one. The part number for the mechanical clock for Worcester Bosh is 7716192036 and it can be ordered from here.
Boiler manual: PDF
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