Recent content by Danny Jones

Hi Tony, Since I changed the pump (new grundfos 15-58/60), when I turn the control knob of boiler clockwise to higher setting and just operate the Central Heating and not the Hot Water, boiler does not lock out anymore. However when I put on both ( CH and HW ), the boiler locks out after 30...

Temperature was measured using a digital thermometer. Temperature difference just after lockout between the feed and return pipes was 18 degrees C. Flow temperature was 78 degrees C.

Hi Tony, Heat sink paste has been used on the thermistor ( located on heat exchange unit). I checked the flow and return pipes temperature difference which is more than 11 C. The hot water tank and pump are located on the top floor wherease the boiler itself is freestanding on the ground floor...

The boiler cuts in and out when operating (green light is on). I tried running the boiler thermostat on lowest setting, it still locks out. Is it to do with central heating pump (circulation). Problem persists both with Central heating as well as Hot water. TRVs not fitted on radiators. All the...

Hi All, I have potterton kingfisher MF RSL 50 freestanding boiler. The boiler operates normally for about 20 minutes and then the lockout (RED neon) comes on. The pump is still running when the lockout happens. You have to wait for about 10-12 minutes before pressing the reset button, then the...