Carver boiler

[Ray scutt]

I have no water coming from the hot tap have changed the non return valve but when I turn on the hot tap nothing even the pump dose not come on but its OK on the cold tap there is no Microchip on any of the taps

 

[Hutch]

Ray it might seem basic, but check the filter in the end of the tap, they get blocked with Chalk / crud.

 

[Ray scutt]

They are mixer taps and the cold runs fine the pump dose not come on when you turn the hot tap on but it dose when the cold in on

 

[Hutch]

I have no water coming from the hot tap have changed the non return valve but when I turn on the hot tap nothing even the pump dose not come on but its OK on the cold tap there is no Microchip on any of the taps

Ray , what caravan, and year might help the forum, when did you use the caravan, when it was Ok.

 

[Ray scutt]

Bailey champagne 1997 it was fine 3 months ago

 

[RogerL]

They are mixer taps and the cold runs fine the pump dose not come on when you turn the hot tap on but it dose when the cold in on

That sounds like the microswitch in the hot tap has failed - but some caravans had a single pressure witch instead of each tap being microswitched.

 

[ProfJohnL]

Heres a way to establish if there's a pipe work problem with the Cascade heater.
Just turn the cold tap on enough to start the pump. Then if you open the hot tap fully the water should flow through the heater and to the tap.

If there is no reasonable flow under those conditions, then it points to blocked pipework.

However, you tell us its been 3 month since it worked. Did you completely drain the water system down whilst the caravan wasn't being used? If not its quite possible the heaters non return valve has been damaged by frost. The action of ice as it expands can dislodge the NRV's O'ring seal causing the valve to jam mostly shut. Some times the valve can be repaired by dismantling and reassembling it, otherwise it might need to be replaced.

It is vitally important to drain a caravan down if its going to be left unused during frosty weather.

 

[Ray scutt]

On the inlet and outlet there is what looks like 2 ball bearings what are these for