Water pressure surging (1 Viewer)

[Clickem]

We don't usually use the water heater, which is a Truma Ultrastore Rapid GE, but on a recent Habitation check they reported that the water pump surges when running hot water

Have not noticed any problems when using cold water, which is pumped by a Shurflo pump

Can anyone give me any pointers to where I should be looking for the cause of this fault? Is it a heater or a pump fault?

 

[Jaws]

We don't usually use the water heater, which is a Truma Ultrastore Rapid GE, but on a recent Habitation check they reported that the water pump surges when running hot water

Have not noticed any problems when using cold water, which is pumped by a Shurflo pump

Can anyone give me any pointers to where I should be looking for the cause of this fault? Is it a heater or a pump fault?

If the hot water system is rarely used I would say you still have air in the boiler.. Can be a bit of a bugger to get out on some systems.. We are lucky and an extended running of the hot tap usually sorts it out

 

[Clickem]

OK, thanks. Water is drained down at the moment so I will try again when I refill

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[Jaws]

One of the reasons I hate draining down ( though of course in the UK winter we have little choice if a van is not going to be used for 4 or 5 days .. That is all it would take to ruin all sorts, from taps to boilers )