This website uses cookies to provide you with a better experience. 4. Replacing your boiler could lead to savings of as much as £305* a year if you live in a detached home. Gain General Access- unhook the expansion vessel from the front of the boiler and lay to one side. Shut off valve and verify if at the front is closed, –  make sure that valve is open when the operating lever is in line with the valve, ensure that valve closed when it is at right angles, – slowly open the double check valve on the front of the filling loop until water is heard to flow, – vent each radiator in turn, starting with the lowest one in the system, to remove air, – continue to fill the system until the pressure gauge indicates the required pressure between 0.5 and 1.0 bar. Manually operate the relief valve to check it’s operation, then refill as above.Re-assemble in reverse order  and refill the central heating system, 14. }These will not be lit until activated 4. The boiler is fitted with an overheat thermostat (which allows it to be used on a sealed central heating system) which will automatically switch off the boiler if the heat exchanger exceeds a pre-set temperature of 110°C ± 3°C. 8. external boiler; frost stat; grant; overheat; wiring box; andy R New Member. 10. Before filling and re-pressurising the heating system you should verify the charge pressure in the expansion vessel Fit a replacement air vent using reverse of above procedure, 8. The boiler thermostat has set to operate at a range  75°C – 85°C. Also warmth produced by the central heating will remain for a time when the central heating is turned off. The boiler will not light until the thermostat is reset. When things do go wrong, everyone in the house soon knows about it and to prevent your home sliding into chaos, we’ve put together this handy guide of repair advice. Normally those malfunctions are short lived. Refer to the procedure given on the front of the vessel. 2. To maintain a longer and more consistent hot water temperaturethe factories fitted a flow restrictor  to all Grant models (Vortex Combi 36 and  Combi Max are the only exceptions) The purpose of flow resistor is to  reduce the flow rate to 15 litres/min. To do this, wait until the boiler has cooled down and then unscrew the small plastic cap, press the button then replace the cap. When the store switch is set to OFF position, the burner will not fire in order to maintain the water temperature. Terms & conditions And now to the point of my post. To access the controls, open the lower … Warning! Your boiler will relight automatically when electric supply is restored. Should you be in any doubt at all about what’s wrong with your boiler, use our free service to get quotes from reliable engineers near you. The boiler will not light until the thermostat is reset. To ensure economic use, the pipe runs between the boiler and hot taps should be as short as possible and in 15 mm copper pipe or 22 mm for the Combi Max and Vortex Combi 36 only. Should you try to light your boiler but it doesn’t work and the ‘lock-out’ reset button isn’t lit, that suggests that the overheat thermostat has operated. Step 5: Check the fault code. 1.Store switch can be used to manually turn off hot water produce is not needed. OVERHEAT Boiler overheat thermostat has operated and switched the boiler off. Your boiler should be serviced annually in order to make sure it is safe and operates efficiently. Check for blockage in filter, fire valve, valves or pipe and rectify. No special material needed. Replace diaphragm or complete diverter valve. 09/03/2015. However, if you are having to reset your boiler two or three times, there will be a good reason for doing so. BURNER Power to the burner for it to operate. Close the primary return isolating valve  (B) and the pump isolating valve  as shown on the picture above. You may or may not drain down the heating system. The overheat thermostat will automatically switch off the boiler in the case of a control malfunction causing overheating. Can someone point me in the right direction please. Check electrical    continuity of pump microswitch. Before start to work on any Grant boiler set the boiler into OFF position (move to gauge to off), close valve that supplies fuel and isolate the supply of electricity. Insufficient combustion air supply to burner. Even the smallest of leaks can be a serious boiler issue. To find trusted engineers near you, use our service to receive free quotes for a new boiler installation. If required, the fuel supply valve may be closed and the water and electricity supplies turned off at the mains. Draining should be performed by qualified boiler specialist. Economy Mode 1 BoiLEr ConTroLs operation Winter … If the boiler overheats regularly there may be a fault and you should contact your installer. Any insurance that offers an annual service and safety inspections is worth thinking about. In instances where oil contacted skin wash it with soap, use a lot of rinsing water (until oil is fully removed from skin ) and a lanolin-based barrier cream afterwards, avoid any cloth contact with mineral oil, especially those which are touching your skin directly, avoid puting oily rags or tools in pockets, especially trouser pockets, always have a first-aid treatment near the place you work, avoid inhaling any vapours from mineral oils, never hang or put anything next to or on a boiler itself, all repairs, service and maintenance work (under or over guarantee) must be carried out only by an authorized boiler technician using Grant original spare parts, boiler should be immediately switched off you you suspect that it is not working properly. Connect vacuum gauge to pump and check pump vacuum. If this does not help, it points to a faulty mechanism within the boiler – most probably the motorised diverter valve. Contact your installed to agree on a service date. Try Boiler Guide today! All ventilation openings must be clean and clear. Hello, we have a Grant Vortex 26 oil fired, 2007. Was working. Any ideas what the … A water hardness test kit is supplied with the boiler. Up to 97% … Allow the pipe to rest on top of the plate heat exchanger. Most Grant boilers come with a 3 year warranty, but they can extend to as long as 5 to 10 years when they’re installed by a G-One accredited installer. Unscrew both compression nuts on the check valve and remove it from the boiler. Boiler Overheat/Limit Thermostat Reset Button. 1:5 OPERATING INSTRUCTIONS 1:5.1 BOILER CONTROL THERMOSTAT The Boiler Control Thermostat is also the ON/OFF switch for the … Warning! 3.Boiler on/off switches can also be used for setting heating or/and hot water. Check nozzle size and type and replace if necessary, Check fuel pressure and adjust as necessary. 9. Take a note of what fuel is suppose to be used (label on the inside of case side panel). Carefully move the pipe forwards and then down by about 100 mm to leave access to the two compression connections on the check valve. If a conventional flue is fitted to the boiler, unhook the flexible air inlet tube from the hook bracket on the crossmember, and remove the hook bracket from the boiler crossmember. Remove the vertical 15 mm pipe from the boiler to gain access to pipe union 6. using a suitable pressure gauge. Use the table below to identify possible faults with your boiler. I've recently moved in to a property and have an issue with an external Grant Pro boiler. Grant Vortex External modules … Where possible the pipework should be insulated to reduce heat loss. For long periods: Set the On/Off switch to OFF and switch off the … If your boiler is a more modern, combination model, attempt a full reset. I have a grant euroflame 50/70 (oil feuled boiler) and when the boiler reaches temperature it shuts off fine but as it cools down the pump starts up again but the boiler won't fire up and it goes into lockout. Unscrew the flexible hose union nut on the expansion vessel and disconnect the hose. Boiler offers x. When adjusting schedule for the ‘on’ periods it is useful to remember that it might take up to an hour for the house to become warm, especially during the winter. To restart, simply set the switch to ON. If your boiler continues to lock out, you will usually see a fault code appearing in the display. Grant Combi, Grant Multi Pass, Boiler thermostat and/or overheat thermostat faulty, Burner not lighting, oil & electricity present at burner, Reset burner air        damper and check combustion, Burner fires but smoke visible from flue or high smoke number, Insufficient combustion air supply to burner. Press reset button –        no more than twice. 7. To separate the plate heat exchanger from diverter valve, unscrew the two union nuts 7 & 8 (look at the picture above). Should the leak be due to a problem with the pump seal, the seal could have worn out. Burner on Indication - ORANGE. 3. Find the best boiler for your needs, or see how the latest A-rated boilers compare with each other and your existing one. 4.Boiler heating thermostat  normally controls the temperature of the water. 4. Boiler needs to have a proper ventilation. Reconnect the flexible hose, ensuring that the sealing washer is correctly fitted in the union before tightening. Check flue condition/size and alter as necessary. 9. If your boiler goes off and you try to light it but nothing happens and the 'Lock-out' reset button on the burner is not lit, the overheat thermostat has probably operated. If you go with a national company, you’ll be covered by big brand protection and not only have your boiler replaced but also be offered extra services like ongoing boiler cover. 5. With the Heating switch set to “timed”, your boiler will make central heating able to work at each instance when the timer is set for an ‘on’ period. }These will not be lit until activated 6. The smarter way to find approved boiler engineers in your area. Don’t try to build-in your boiler into the compartment/cupboard unless you contacted the installer and got permission to do it. Boilers are normally extremely reliable and provide our homes with heating and hot water whenever we call upon them. You are here: Home Heating Burner Parts Burner Controls Grant TPBS33 overheat thermostat reset button Grant TPBS33 overheat thermostat reset button Product code: 400125 Exc. Flue pipe or liner is too large or existing stack is unlined. Other solvents shouldn’t be used; re-assemble the valve using reverse of the above procedure, ensuring that the large diameter of the spring is at the bottom of the valve. Page 5: Notes About your fuel must not be obstructed. I have a Grant Combi mkII which has been giving me an over heating problem after using hot water recently , prime example is i have a shower in the morning before work hot water is fine , by the time i've dressed and come down stairs the boiler has gone in to 'Overheat' , eventually once the boiler has cooled i can use the reset and the boiler will work fine , … ‘Lockout’ Indicator- RED. BOILER ON/OFF SWITCH That the thermostat is reset vessel and disconnect pipe unions 1, 5 & 9 as on! 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