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 Topic: Hot water heater lowering temp
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22/12/2021 at 9:34am
Location: London
Outfit: Lunar Cosmos 524
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Not sure which Truma unit you have fitted, but my Truma Combi 6 has only two heat settings (via control panel), ECO at 40C and HOT at 60C.
ASFAIK there is no adjustable thermostat on the boiler unit as such, and the spare parts catalogue doesn't list one (https://www.leisurespares.co.uk/files/ww/combi%206%20e%20uk.pdf)
You should be able to check the water temp coming out of the taps with a cooking thermometer, it probably won't be precisely 40C or 60C, but close enough, significantly above that would indicate a fault. It is possible the fixed temp thermostat has failed and the boiler is literally 'boiling'! That would not be good as apart from shortening life of boiler parts it would also be heating water continuously as never tripping out on reaching set temp!
I'm struggling to think of a caravan/camper I've seen that didn't have a mixer tap on every outlet, so getting water of the right temp for use shouldn't be a problem. Temps above about 41C are getting uncomfortable to the skin and above 45C risk scalding. With only 10 litres volume of hot water in the boiler/tank, it's necessary to use a mix of hot and cold water for say a shower to get sufficient volume of comfortable water overall to complete the task, rather than supply only heated water at the comfortable temp, hence the water being heated to above comfort levels.
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via mobile 21/12/2021 at 10:05am
