Thank you Tibbot very useful information, i assure you no ones lives are at risk the link on the thermal fuse was momentary to check other components like pump fan etc. And was removed afterwards. Once the hex has been replaced i will be sure to do my usual combustion analysis to check the...
I am aware of that Steve32, but I was after a broad target group of consumers and installers, in the hope of there being someone out with either the knowledge or previous experience with this fault, as it stumped the technical man.
It didn't lockout on overheat, pump seized registering no flow, temp at time of error was 46degree flow and 18 return. During the boilers pre-purge stage(1). I do have the MI.
Yes im competent, and gas safe, by-passed to confirm my suspicions about the defective sensor, remeha technical man was pants. Told me the sensor can't be replaced and that the whole gas to water heat exchanger had to be replaced, £500.00 no thanks.
Linked the sensor on top of the heat exchanger and works fine reconnect and e13 comes back. New pump, and it works with link so I know its okay no air plenty of flow. Pump was original fault, but did that take the sensor out and can it be replaced??
E13: Heat exchanger fuse protection had responded; replace heat exchanger after finding and solving the cause. Pump was knackered so replaced it but still get e13 do I really need to replace the heat exchanger just because the tiny sensor on the top cannot be removed???