Hi, When i put my heating on with my procombi 85he boiler it comes on for 10 minutes or so then the red light comes on and stays on. What does this mean?

Kris, January 2010

to add these 2 switches are there for a reason but the reason is for regulating the heat flow the boiler is not designed for max heats its designed for moderate heat if this is left on for say a week this is the fault and can reduce the efficiency of the boiler

techienumber1, March 2015

hi just repaired the same problem for my sister did some online tech stuff and found out that if you have the regulators on max that is the 2 dials at either
side of the big switch if it is on max then this causes heat intensity and fault is coherent with say if a kettle gets too hot turn these down to say half way this will regulate the heat in the water flow and allow you to have hot not boiling water

techienumber 1(qualified in IT), March 2015

try changing thermistors if dos not work then pcb gone need replacing quit exp.

aj, July 2014

hi chris, never mind about paying extotionate fees to have a minor problem sorted out, ive just had same prob it is your air / presure flow it will cost you about £5. for a presure switch

terry, September 2013

hi, i instal procombi he 85 in my house 2 day and i don't know how to instal external roomthermostat?
thanks

pj, February 2010

the red light means its overheating we have had the same problem for 3 weeks plumber has tried 3 times to fix with no success

r fuller, January 2010