No hot water in Motorhome (1 Viewer)

[burstner t660]

Hi all,
just been on our first trip out, before we left I always do a check on Tyres,engine oil,water etc
then check the heating and water in the van, when it came to checking the water/ pump, the pump
had failed ( not even powering up) I ended up fitting a whale pump from the local Go Outdoors (last one they had )
the original pump was a reich 15l/ min. 1bar the whale pump is a 19l/ min.
Got it all working, but when we arrived on site I put the hot water on the Truma system on and waited for a while then
opened the hot water tap, it spluttered for a bit while forcing all the air out, left the hot tap open for what seemed to be ages
....no hot water, the heating worked fine though.
Also noticed that the toilet flush wasn’t as powerful as previous,but the cold water pressure seemed fine. I’m thinking that
the new whale pump isn’t holding pressure for the hot water tank and the water is running back into the water tank.
Any ideas please.
regards Steve

 

[WillH]

Did the old pump have a non-return valve, has the new pump got one?

 

[burstner t660]

Not sure, but I’ve ordered one exactly the same as the original one, but my thoughts are pointing to the whale pump only because it doesn’t specify any bar symbol on it and the original reich pump does, thanks for your reply.
Regards
Steve

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[tonyidle]

One way valves are an option because whilst essential on a pressure switched system they are not required on a microswitched one. Your Whale pump will be fine if you add a one way valve.

 

[David and Sally]

Have you closed the Truma auto dump valve?

Have you closed any tap draining valves?

Does water flow ok to cold taps?

 

[burstner t660]

One way valves are an option because whilst essential on a pressure switched system they are not required on a microswitched one. Your Whale pump will be fine if you add a one way valve.

Thanks, think I’ll wait for new pump, think the hot water tank is draining back into the water tank because every time I open the hot water tap it’s full of air.

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[burstner t660]

Have you closed the Truma auto dump valve?

Have you closed any tap draining valves?

Does water flow ok to cold taps?

Yes all drain off taps are closed and the cold water pressure is fine other than the toilet flush which seems to lack pressure but still works.

 

[two]

Thanks, think I’ll wait for new pump, think the hot water tank is draining back into the water tank because every time I open the hot water tap it’s full of air.

I don't think water will be draining back and, even if it was, a new pump won't solve that.
Has water even reached a hot water outlet?
My guess is that the non return valve to your boiler is stuck in the closed position and no water is getting into it at all (although I'm not sure how you get 'spluttering'). A new (stronger) pump might clear it, else remove and release or replace the NRV.

 

[Jev88]

Have you opened hot taps without heating to make sure you pushed all the air out of the hot water tank?

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[burstner t660]

I don't think water will be draining back and, even if it was, a new pump won't solve that.
Has water even reached a hot water outlet?
My guess is that the non return valve to your boiler is stuck in the closed position and no water is getting into it at all (although I'm not sure how you get 'spluttering'). A new (stronger) pump might clear it, else remove and release or replace the NRV.

Thanks for your reply, will try that.
regards
Steve

 

[two]

I'll keep my fingers crossed for you, Steve.
(Doesn't usually help much, but there's always a first time.)
Best of luck!

 

[Vipar]

I think that you need to join the gang it will be the best £15 you will ever spend

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[two]

(... and we can answer your question about NRV's !-)

 

[ambulancekidd]

 

[Snoopy]

Hi and welcome

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