Horttmann H37XL
Hot water wasn't heating so I reset programmer to factory defaults. Turned out the problem was a faulty motorised valve. However I want to change the settings back to where they were previously but when I press the green button nothing happens - it does not take me to the displays to change the timings. Any suggestions please as to what I might be doing wrong.
Hot water wasn't heating so I reset programmer to factory defaults. Turned out the problem was a faulty motorised valve. However I want to change the settings back to where they were previously but when I press the green button nothing happens - it does not take me to the displays to change the timings. Any suggestions please as to what I might be doing wrong.