Common Faults with Gledhill Accolade Estate

Common Faults and Troubleshooting Guide for Gledhill Accolade Estate System

Note: All repair works must be conducted by a qualified engineer. Refer to the Gledhill Accolade Estate manual for detailed instructions.

Download Here : Gledhill Accolade Estate Manual

Buy Gledhill Accolade Estate Parts & Spares Here


  • In hard water areas, it's recommended to fit an in-line scale inhibitor. Lowering the stored water temperature can also reduce scale formation. If the recovery rate is significantly affected, scaling may have occurred. Follow procedures recommended by a reputable Water Treatment Company in such cases.


  • Check for no water at the tap. Ensure the mains water supply is ON and that the line strainer isn't blocked. Confirm the combination valve is installed correctly for proper water flow.
  • If water at the tap is cold, ensure the boiler is ON and functioning correctly. Check for airlocks in the primary system. Isolate the unit at the mains electric supply and perform the following checks: i. Cylinder thermostat ii. Thermal cut-out (resettable by pushing the red button) iii. Motorised valve iv. Boiler thermostat v. Boiler thermostat cut-out (if fitted)
  • Never bypass any energy cut-out under any circumstances. If units are not getting hot and the heat source is electrical, ensure immersion heaters are isolated from the mains before resetting the energy cut-out.
  • If immersion heaters need replacing, you can find them on this website.


  • If cold water is discharging from the expansion relief valve, check the pressure on the expansion vessel when cold and recharge if necessary.
  • If the fault persists, and operating the easing control doesn't resolve it, either the Pressure Reducing Valve or the Relief Valve may be at fault. If cold water pressure is too high, replace the Pressure Reducing Valve with a Gledhill-approved replacement. If pressure is correct, replace the Relief Valve with a Gledhill-approved component.
  • Refer to Commissioning for the drain-down procedure.
  • In case of an overheat fault with very hot water discharge, turn off the heat source but not the water supply. Once cool, check thermostats and energy cut-outs in the boiler and immersion heaters. Replace faulty components with units supplied by Gledhill and ensure they work correctly before returning the system to full operation.