HELP! Honeywell ST699 programmer wont turn off

Pheam

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Jan 7, 2013, 6:40:57 PM1/7/13

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i have one of these

http://www.zen58589.zen.co.uk/st699.pdf

The problem is it wont turn off, even when the switches are in the off
position.

The lights stay on and the boiler is constantly running.

Can it be repaired? Or would a replacement solve the issue?

Close to tears right now, im spending £10 a day on gas.

Money i can ill afford to waste....please help

--
Pheam

Dave Liquorice

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Jan 8, 2013, 3:59:40 AM1/8/13

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On Mon, 7 Jan 2013 23:40:57 +0000, Pheam wrote:

> Can it be repaired?

Possibly assuming one or both of relays has welded its contacts together.
Are you sure it's not just thrown a wobbly? Have you done the "factory
reset" procedure?

> Or would a replacement solve the issue?

Unless you have the electronics skills to make the correct selection of
relay, remove the old and fit the new it's probably better to replace.

> Close to tears right now, im spending £10 a day on gas.

There should be a overall switch somewhere to turn the entire
heating/hotwater system off, use it. Gawd, the diybanter lot are a bit
dim aren't they?

--
Cheers
Dave.

Graham.

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Jan 8, 2013, 7:33:07 AM1/8/13

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Google- 911 stuck gas pedal.

--
Graham.
%Profound_observation%

Davey

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Jan 8, 2013, 7:47:59 AM1/8/13

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On Mon, 7 Jan 2013 23:40:57 +0000

I had this problem, but it was in fact a stuck Zone Valve on the side
of the Hot Water Tank that caused it. Due to the wiring,
which was done according to the schematic, if the valve is saying that
it is open, then the boiler is allowed to fire. This needs the relevant
wiring diagrams and some kind of voltage tester to diagnose.
No need for a new anything, the valve just needed to be freed up.
--
Davey.

Dave Liquorice

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Jan 8, 2013, 10:53:50 AM1/8/13

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On Tue, 8 Jan 2013 12:47:59 +0000, Davey wrote:

> I had this problem, but it was in fact a stuck Zone Valve on the side
> of the Hot Water Tank that caused it. Due to the wiring,
> which was done according to the schematic, if the valve is saying that
> it is open, then the boiler is allowed to fire.

Incorrect wiring... all the switches should be in series so all the
conditions have to met before the boiler fires. So:

Supply -> Programmer -> Stat -+-> Valve Motor
|
+-> Valve Switch -> Boiler.

Incorrect wiring of supply to a valve switch and stuck open valve could
be the problem.

--
Cheers
Dave.

Davey

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Jan 8, 2013, 2:42:56 PM1/8/13

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Nope. The wiring was correct according to the Honeywell diagram, and
the expected power route was through the program switch, then via the
zone valve, and to the boiler. But when the valve stuck open, the power
bypassed the programmer, and let the boiler fire. This was on a HW or
CW system, which was why it had two possible power trains to the boiler.
I think Plan 'C', if that makes sense. It was all done on this NG, so if
the messages are still there, they can be found. I'll also try to dig
it up.
--
Davey.

Davey

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Jan 8, 2013, 2:49:22 PM1/8/13

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The thread is subject:
Honeywell Boiler Wiring, dated 4 July 2012.

It's all in there somewhere.
--
Davey.

Roger Mills

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Jan 8, 2013, 6:10:12 PM1/8/13

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A stuck zone valve can certainly keep the heating running even when
turned off at the programmer - but I wouldn't then expect to see the
programmer's lights on, as reported by the OP.
--
Cheers,
Roger
____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.

Davey

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Jan 8, 2013, 6:50:11 PM1/8/13

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Yep, you're right, I do believe the lights on mine were out, as you
say. But the action was as I stated.
--
Davey.

F

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Jan 8, 2013, 9:34:14 PM1/8/13

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Turn the boiler off when it's not needed and until it's fixed?

However, looking at the OP's email address - @diybanter.com - do we have
a troll perhaps?

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F

ARW

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Jan 9, 2013, 2:15:06 PM1/9/13

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Probaly not a troll. Did you read the recent threads about their web site?

--
Adam

F

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Jan 10, 2013, 6:59:29 AM1/10/13

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On 09/01/2013 19:15, ARW wrote:

> F wrote:

>> However, looking at the OP's email address - @diybanter.com - do we
>> have a troll perhaps?
>
> Probaly not a troll. Did you read the recent threads about their web site?

Yes, that's why I wondered if it was a troll taking the whatsit.

--
F

polygonum

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Jan 10, 2013, 7:04:59 AM1/10/13

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Seems to have this web site:

http://www.handsworthwoodbowlingclub.co.uk/

--
Rod

polygonum

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Jan 10, 2013, 7:06:00 AM1/10/13

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Meant to say - so might be Phil Harris given their posting name?

--
Rod

geoff

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Jan 10, 2013, 5:26:50 PM1/10/13

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In message <Pheam....@diybanter.com>, Pheam
<Pheam....@diybanter.com> writes

Oh dear a diybanterer

If its doable, I will repair it for you for £30 + del + VAT =>£45.60

www.cetltd.com

--
geoff