Heatslave 15/19 - Keeps kicking in

[dj060004]

Hi All,

We have a heatslave 15/19 which was fine until a couple of days ago. A guy came round from the waterboard to fit us a water meter [uck] and since then, every 10 minutes or so, the boiler keeps kicking in.

The central heating is currently switched off [pressure is about 2bar if that makes a difference] on the front panel, and the water system is set to on perminatly. Before his visit, the boiler would come on every 2 hours or so, and also when you switched on a tap. Now, it comes on every 10 minutes or so.

Every 10 or so minutes you can hear gurgling in the pipes, and clicking noises come from the boiler as if someone has turned on a hot tap - assume this a relay triggered by a flow switch or something.

Anyway, the boiler then fires up for 30 seconds or so - during this time we get some more clicking and gurgling. It then goes off, and repeats the cycle after about another 10 mins.

The gurgeling sounds like air I guess - but I dont know where. Would air trapped in the closed rad circut cause this to happen, even with the central heating off? I have switched on all the taps in the house - there was some initial splutrering [he didn't leave the taps on when switching the main supply back on] - but thats all gone now.

I could bleed the rads, but don't have a key at the moment - don't want to waste time if it's not that.

If anyone has any ideas, that would be great.

Many thanks

 

[Dan Robinson]

Doubt it has anything to do the the heating side.

Have you got any dripping taps?

Other than that it sounds like you have a leak to me.

 

[dj060004]

No dripping taps.

Leak? Oh great! What could the gurgling sound be then? It's every time - the boiler never kicks in [unless you switch the tap on or course] without the gurgle sound [and you get no gurgle if you switch the taps on]

It was fine before this idiot came! I have just checked the only bit he touched when he was here [the main stop cock] and there is no leak there.

Thanks

 

[Nixt]

Just a possibilty but if the water meter has a non-return valve, it could be water that used to expand down the cold feed now has nowhere to go. If so and there are no leaks try fitting a mini expansion vessel on the cold. The other fault may be the 'Sika' paddle flow switch.

 

[dj060004]

Thanks for your reponses to this.

But... does anyone else have any ideas? I am going to get the water board back out to remove the meter, or fix the problem - their choice - but they can't come out for 3 weeks!

 

[Dan Robinson]

I doubt they will be able to help much - but worth a shot obviously.

I think you'll need to call someone out to have a look. There are noly so many things that can be relayed over the tinterweb.

 

[chr15]

Sounds like it might be air in the mains water pipe causing the flow switch to bring on the boiler now and again,if it is it should settle down pretty quick. Failing that the flow switch may be faulty.