PulsaCoil III corroded rod thermostat

Go down

PulsaCoil III corroded rod thermostat

Post  sgw on Wed Apr 14, 2010 3:37 pm

A few weeks ago my Pulsacoil III started "running out" of hot water very quickly (within a couple of minutes). Switching on the boost switch resolved the problem, so, having read some posts on this forum I thought the issue might be with the lower rod thermostat. When I pulled it out it was extremely corroded (compared to the upper rod which was perfectly shiny copper). To test if it was the thermostat, I replaced the corroded (lower) rod with the clean (upper) one and turned off the boost electric supply and the unit worked perfectly. However, after buying a new rod thermostat I went to put it all back together and found that the thermostat that was clean a few day ago is now corroded. I tested the lower immersion element and it measures 18 ohms so it doesn't seem faulty and there is no evidence of a leak on the outside of the unit but somehow it must be leaking to make the thermostat wet.

Does anyone know if this means I need to replace the immersion heater element? If so, do I need to drain the whole thermal store first?



Posts : 1
Join date : 2010-04-14

View user profile

Back to top Go down

Re: PulsaCoil III corroded rod thermostat

Post  Mike the Boilerman on Wed Apr 14, 2010 4:05 pm

Hi sgw,

Yes the heater element needs replacing as the copper tube the thermostat fits into is leaking. It's a common fault. And yes you have to drain the whole store to do it, then re-fill it afterwards.

Good luck with it!

Cheers, Mike

Mike the Boilerman

Posts : 427
Join date : 2009-01-08

View user profile http://gledhill-repairs.forumotion.net

Back to top Go down

Replace it

Post  sunny.sahdev on Tue Sep 10, 2013 6:58 am

I would agree with Mike, replace it before it becomes worse and starts touching the electrical conductors.


Posts : 383
Join date : 2013-08-21
Age : 33
Location : Vedhas Limited, 960 Capability Green

View user profile http://www.vedhas.co.uk/vedhas-what-we-do/pulsacoil-repair/#

Back to top Go down

Re: PulsaCoil III corroded rod thermostat

Post  Sponsored content

Sponsored content

Back to top Go down

Back to top

- Similar topics

Permissions in this forum:
You cannot reply to topics in this forum