Truma boiler dumping water

[Fazerloz]

My view is more complex more expensive and more likely to go wrong a simple parkup or set-off checklist covers forgetting we drain down after each trip.

Certainly in my case more likely to go wrong. Firstly you have to remember the list.

 

[barlicker]

I have a Truma 4e from year 2000 and the frost control vent is now not supplied. The instructions say to turn off water pump and empty water heater if frost is forecast.

 

[witzend]

And when you forget and people do forget, then boiler gets destroyed it makes for a very expensive peg. They are there for a very valid reason.

I'd rather rely on my memory than a Auto Valve

 

[Okta]

I'd rather rely on my memory than a Auto Valve

I don’t see it as one or the other but as both. First line of defence is memory but if unforeseen circumstances prevent draining down then a safety back up might save a lot of time and expense.

 

[witzend]

I don’t see it as one or the other but as both. First line of defence is memory but if unforeseen circumstances prevent draining down then a safety back up might save a lot of time and expense.

if it works I couldn't rely on that

 

[Okta]

if it works I couldn't rely on that

I don’t think anyone should rely on it, draining down for cold weather is part of owning a motorhome or caravan. However it does no harm to have a safety device because people 1) make mistakes and 2) get caught out by changing circumstances.

 

[Fisherman]

I don’t think anyone should rely on it, draining down for cold weather is part of owning a motorhome or caravan. However it does no harm to have a safety device because people 1) make mistakes and 2) get caught out by changing circumstances.

Akin to a plan B, or a a back up.

Alexander Pope famously said

“To err is human — and let’s not forget it”​

And due to this simple fact engineers have factored the above into their designs.
And sadly in the past we have seen the results of not following this mantra.
Soon after many railway accidents the dead man’s switch was designed, and many back ups are now integrated into signalling systems that will override driver error. Of course the consequences here are far worse than a ruined boiler.
But the same principal applies, better to have a back up than not.

 

[barlicker]

I have a Truma 4e from year 2000 and the frost control vent is now not supplied. The instructions say to turn off water pump and empty water heater if frost is forecast.

Should have said 2020

 

[Pudsey Bear]

And I get your point pudsey, at least we are giving the OP options, it’s up to them to decide.

Indeed, been on the dog for 26 days so kept my tryping to to a bare minimum

 

[Pudsey Bear]

Certainly in my case more likely to go wrong. Firstly you have to remember the list.

I have a Liz who forgets nothing if it has anything to do with my jobs

 

[Pudsey Bear]

And also of course we have loads of MoHo forums all telling us it's drain down time so make sure you visit at least one.

 

[witzend]

If it works I couldn't rely on that

No point in having it if you can't rely on it better to have one of these
https://tinyurl.com/3rc43fph

 

[Okta]

No point in having it if you can't rely on it better to have one of these
https://tinyurl.com/3rc43fph

On my motorhome I have both, next to each other. You are allowed both you don’t have to choose between them.

 

[Pudsey Bear]

On my motorhome I have both, next to each other. You are allowed both you don’t have to choose between them.

But which is your favourite?

I know you shouldn't choose

 

[Okta]

But which is your favourite?

I know you shouldn't choose

I like to be even handed so I open both together at drain down time. The frost valve would be the one I kept if I had to choose, I can use it to drain down as well as having the failsafe.

 

[Pudsey Bear]

I just have the simple one, common as much here

Got home last night and drained down this morning.

 

[Traveller656]

Thank you everyone it’s now working well, I heated it as suggested and it’s been good since.

 

[ChrisCross]

Pegs and wedges don’t work on this type of Truma frost valve. Warm it up as suggested by @Fazerloz .View attachment 117816

I put a hot water bottle over the valve. 10 minutes and its sorted.

 

[Fisherman]

I have a Liz who forgets nothing if it has anything to do with my jobs

I reckon you speak for most of us. There are plenty more like Liz out there.

 

[Harrytherid]

Mine still dumps the water even if it is practically boiling so I have gone the plastic wedge route on a piece of sheering elastic so it is easily pulled out and not lost.
My wife has strict instructions to remind me to do it which she is very good at doing. One day , maybe, I shall take the thing apart and find out what is wrong with it but just now I have a lift to install in the house so.....