Camray 5 combi 90A switching off after initial burn

[gjf60]

I have a Camray 5 around 14 years old which switches off after the initial 15 min burn. The wall thermostat has not clicked off. If I then either turn off the power or click off the wall thermostat and then back on again it comes back to life. It then does the normal procedure, burn for a few minuits then off for a few minutes then back on until the wall thermostat clicks out. This is a intermittent problem somtimes it works ok.

 

[DaveyHep]

What system pressure have you got ?

 

[gjf60]

What system pressure have you got ?

Its 1.5 bar when hot.

 

[gjf60]

Last October I replaced a leaking 3 way motorised valve body. I had this problem on a regular basis before I replaced it. Then afterwards the problem disappeared until the other day after I had taken the top cover off to check for leaks as the pressure had dropped very slightly to 1.25bar over a period a few weeks. Did not find any leaks. I topped up to 1.5 bar again. After this the cutting out started again. When it cut out this morning I started to take off the top cover and as I was doing so it started again.

 

[gjf60]

Does anyone have any suggestions on this ? Seems like a loose connection somewhere to me

 

[Last Plumber]

When was it last serviced ?
( by a heating engineer).

 

[gjf60]

about 12 months ago

 

[Last Plumber]

Doesn't sound like much. It needs servicing properly every 12 months. My advice is to get an oil tech or heating engineer out to service it and explain the issue you have.

 

[gjf60]

Any ideas what it might be ?

 

[Riley]

I think what they're alluding to is that it's not a diy fix