Gledhill Repairs
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Post  hifi Mon Mar 28, 2011 10:40 am

Hi,

I came home last night to find all the carpets in the flat were wet. The header tank was full of boiling water and the plastic was deformed.

The thermostats had been replaced with the control/safety type and the manual overheat had been removed by myself in the past.

I think that the isolator for the header top up was probably left on and the deformed caused so much water to be released.

Would I be right in thinking that it's most probably a complete failure of the rod thermostat? I can't see any water damage on it or water in the housing.

I have switched the offpeak/boost thermostats round for now to test. Can I test the thermostat to see if it has failed (I have a multimeter to hand)?

I would like to know if I have overlooked anything, as this failure has caused a fair bit of damage and wouldn't want it to happen again.

All advice welcome.
Thanks.



hifi

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Join date : 2011-03-28

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Post  MK Group Ltd Mon Mar 28, 2011 12:06 pm

The easy way to test a rod stat is to carryout a continuity test on it, then stick the rod stat in boiling water, if the stat does not close you know it needs replacing.

Hope this helps

Regards

Gary
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Post  MK Group Ltd Mon Mar 28, 2011 12:09 pm

I would strongly suggest you re-instate the safety manual overheat stat unless you have the combined overheat rod stats supplied by Gledhills.

Regards

Gary
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Post  hifi Mon Mar 28, 2011 1:10 pm

Thanks. They are the control & safety rods. I switched the rods a few years ago with the 'kit' from segel.

The supposedly failed stat seems to be working again. I've placed it in the 'boost' heater and it cuts out fine.

Anyhow, I'm running with the stat from the booster in the main element, and the manual overheat stat reinstalled. The header tank has also been half emptied so there is room for expansion if needed. Think I might keep it on like this, whilst I'm in the flat and awake (18hour tariff) and see if there are any further issues.


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Post  Midland Boilercare Fri Apr 22, 2011 5:06 am

Hi Hifi

You've probably already sorted out the problem, but just in case you haven't, I have come across a similar situation for one of my customers and the problem was due to the thermostat rod pocket of the element leaking. The water seeped into the thermostat and bridged the contacts, causing the element to continue to heat up.

Check the thermostat pocket for leakage (usually shows up as discolouration on the thermostat itself).
Midland Boilercare
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Post  sunny.sahdev Fri Sep 13, 2013 6:31 am

Sounds like a faulty or incorrect thermostat rod. You can find the right one via this link: Gledhill Pulsacoil 2000 Spares

The part I would recommend is a MIP080

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