savio combi cuts out when reaching temp!

Hi,

Is there anyone who can help me please - I'm gonna start pulling my hair out soon!!

I have a Savio Aquapiu 120 mfs combi boiler. The main problem is with the hot water - it heats to 60 degrees then it stops burning and doesn't fire up again until the water is stone cold!

I have had British Gas out 3 times, they have changed the thermostat and diverter valve, but it is no different. Is there an electric cut-out switch or something that could be playing up?!

It worked fine the other day, but hasn't worked since. Any ideas would be greatly appreciated!!

 

If it heats to only 60 degrees..what you are implying is that the water temp is less than that, first. I can only figure that your boiler is down your frigid basement that is maybe 50? and the boiler has been off for so long that it drops all the way down to some temp below 60?

And yes, it would now seem like there is something else that is causing it to cut out.

I see that you said you already changed out the thermostat.

Have you checked all the connections (for looseness, bad wire nut jobs, corroded spades), thermostat wires and other electrical connections, for starters?

How many safety type electrical components (pressure switch, flame roll out switch, vent gas temp switch, etc.) does your boiler have? Anything wrong that these things sense will cut out the flame.

What kind of ignition does your boiler have? Is there a flame sensor?

 

Dave, the OP is talking about a European boiler and 60 is 60°C (140°F).

 

Yeah, sorry 60 degrees C. This temp is right, but as soon as the boiler reaches the desired 60 degrees C, it shuts down and only fires up again when the water is back to cold!!

It is a combi boiler and heats the water as it is required, we do not have a hot water tank.

Thanks for your replies!

 

Are there any UK or Euro based heating forums that you can find? It sounds like a control situation (I'm not even sure if we can call it a problem if it is doing what it is supposed to be doing). Bottom line is that most of us are in North America and have never even heard of Savio... now ACV is another matter! ;-)

 

I see. That might throw a whole new light on things. Now I'll have to reread the OP again.

 

I follow now. So your temp swing is obviously WAY to great. It sounds like an aquastat type control issue you are having. Ovbviously it's not that it doesn't work. It works. It is just the settings are way off for some reason. (Why, is another issue) Do you see anything on your boiler where you can regulate temperatures? Have you looked?