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H3699 Rev. L
Thermann Owner’s Manual
thermann 25/50 Litre Water Heater
Troubleshooting
High Electricity Bills
• Is the Pressure & temperature
Relief Valve discharging too much
water?
• Is one outlet (such as the shower)
using more hot water than you
think? See “no Hot Water”.
• Is there a leaking hot water pipe
or dripping hot water tap? a small
leak can waste a large quantity of
hot water.
• Replace faulty tap washers and
have your plumber rectify any
leaking pipework.