I have a IMI Powermax 155 which is working fine apart from a buzzing noise coming from the control panel (the timer contol is built into the boiler) I\\\'ve taken the boiler apart to get to the timer control but it\\\'s a sealed unit made by Hortmann (model 626 (oem) t.55) Does anyone have any suggestions on how to stop this buzzing - I\\\'ve tried a reset but it made no difference. The buzzing only happens at the weekend so it must be times somehow.
Thanks
Thanks