Danesmoor 15/19 runs for about 7 mins then locks out, restarts OK but every
time locks out again, running for less and less time between lockouts. The
engineer failed to turn up twice so will look for someone else on Monday, but
in the meantime I'd love to get an idea of what the problem might be. Any
thoughts gratefully received.

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On 15/04/2018 19:14, Chas wrote:
Danesmoor 15/19 runs for about 7 mins then locks out, restarts OK but every
time locks out again, running for less and less time between lockouts. The
engineer failed to turn up twice so will look for someone else on
Monday, but
in the meantime I'd love to get an idea of what the problem might be. Any
thoughts gratefully received.

A pump failure or blockage would cause it to trip on its internal
overtemp stat.



--
Cheers,

John.

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On Mon, 16 Apr 2018 16:57:31 +0100, John Rumm wrote:

Danesmoor 15/19 runs for about 7 mins then locks out, restarts OK
but
every time locks out again, running for less and less time between

lockouts.

A pump failure or blockage would cause it to trip on its internal
overtemp stat.

Presumably this is an oil boiler. Overtemp != lockout. Lockout is
caused by flame failure for more than 10 seconds or so. I'd start by
checking that any filters aren't clogged.

--
Cheers
Dave.

On 16/04/2018 20:34, Dave Liquorice wrote:
On Mon, 16 Apr 2018 16:57:31 +0100, John Rumm wrote:

Danesmoor 15/19 runs for about 7 mins then locks out, restarts OK
but
every time locks out again, running for less and less time between

lockouts.

A pump failure or blockage would cause it to trip on its internal
overtemp stat.

Presumably this is an oil boiler. Overtemp != lockout. Lockout is
caused by flame failure for more than 10 seconds or so. I'd start by
checking that any filters aren't clogged.

There might also be an optical flame sensor - if that is sooted up it
could cause it sense flame failure.


--
Cheers,

John.

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| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On Tue, 17 Apr 2018 01:25:16 +0100, John Rumm wrote:

Presumably this is an oil boiler. Overtemp != lockout. Lockout is
caused by flame failure for more than 10 seconds or so. I'd start
by
checking that any filters aren't clogged.

There might also be an optical flame sensor - if that is sooted up it
could cause it sense flame failure.

No might about it, there is. A sooted up photo cell tends to produce
an "all or nothing" failure mode, rather than progessively shorter
run times.

--
Cheers
Dave.

In article ,
John Rumm wrote:
On 16/04/2018 20:34, Dave Liquorice wrote:
On Mon, 16 Apr 2018 16:57:31 +0100, John Rumm wrote:

Danesmoor 15/19 runs for about 7 mins then locks out, restarts OK
but
every time locks out again, running for less and less time between

lockouts.

A pump failure or blockage would cause it to trip on its internal
overtemp stat.

Presumably this is an oil boiler. Overtemp != lockout. Lockout is
caused by flame failure for more than 10 seconds or so. I'd start by
checking that any filters aren't clogged.

There might also be an optical flame sensor - if that is sooted up it
could cause it sense flame failure.

On my Viessmann, the ionisation sensor was the problem. And they didn't
mention the replacment which has worked perfectly - was a different design.

--
*Do infants enjoy infancy as much as adults enjoy adultery?

Dave Plowman London SW
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