I have a Fabric Excelsior 130 litre unvented water heater in my loft. I have it timed to come on for 1.5 hours each morning. During these recent hot days, I'm finding that the water coming from the hot water taps is far too hot, even steaming.
A few days ago, I drained the tank of hot water by leaving the bathroom hot water tap on for a while. Then I turned the thermostat on the side of the heater down to 30C, turned the heater on for a few hours, then tried the hot water tap again. The water from the tap was again steaming hot.
Suspecting a malfunctioning thermostat, I replaced it like-for-like, rewiring it exactly like the old one. Again, I drained the tank of hot water by leaving the bathroom hot water tap on for a while, then set the new thermostat to 30C just to test it, turned the heater on for a few hours. Expecting to now have just warm water from the tap, I again had steaming hot water.
I'm pretty sure the heater only has this one thermostat.
Wondering if anyone can suggest what might be going on here and what is causing the water to overheat? I've uploaded some photos which might help. Any advice greatly appreciated.
A few days ago, I drained the tank of hot water by leaving the bathroom hot water tap on for a while. Then I turned the thermostat on the side of the heater down to 30C, turned the heater on for a few hours, then tried the hot water tap again. The water from the tap was again steaming hot.
Suspecting a malfunctioning thermostat, I replaced it like-for-like, rewiring it exactly like the old one. Again, I drained the tank of hot water by leaving the bathroom hot water tap on for a while, then set the new thermostat to 30C just to test it, turned the heater on for a few hours. Expecting to now have just warm water from the tap, I again had steaming hot water.
I'm pretty sure the heater only has this one thermostat.
Wondering if anyone can suggest what might be going on here and what is causing the water to overheat? I've uploaded some photos which might help. Any advice greatly appreciated.
Attachments
-
Heater brochure.pdf2 MB · Views: 165
-
Installation manual.pdf6.7 MB · Views: 281
-
Heater label.jpg253.7 KB · Views: 149
-
Heater photo.jpg230.9 KB · Views: 149
-
Old thermostat.jpeg356.3 KB · Views: 138
-
Old thermostat wiring .jpeg328.9 KB · Views: 135
-
New thermostat leaflet 1.jpeg325.9 KB · Views: 126
-
New thermostat leaflet 2.jpeg387.4 KB · Views: 133