HEATING ONLY WORKS WHEN HOT WATER IS ON! Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

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I HAVE A TRADITIONAL BOLIER WITH UPSTAIRS TANK. THE HEATING WILL NOT WORK INDEPENDANTLY BUT WILL COME ON WHEN THE HOT WATER IS SWITCHED ON. WHEN THE HOT WATER REACHES TEMPERATURE THE SYSTEM SHUTS DOWN.

THE THERMOSTAT IS RIGHT UP AND I HAVE OPENED THE MOTORISED VALVE MAUALLY.

ANY OTHER TROUBLE SHOOTING ADVICE OR SOLUTION WOULD BE APPRECIATED :?