i'm gonna tell you a story.
i installed this boiler & converted the system to sealed 5 years or so ago for my auntie and have been tending to the little blighter regularly ever since. the latest problem to have arisen has been making me scratch my head a little today & i would be grateful for any helpful suggestions.
the fault described to me was that it wouldn't fire up for ch & i also gleaned that the hw was a little erratic too.
ive dropped around on a couple of occasions over the last week, flicked the heating on & boiler fired, rads warmed as i drank my tea. apparently i have magic fingers.
as usual as soon as i drive off problem returns.
had a bit more time to spend on it today. so fired it up & ch started. rads warmed though not completely. all trvs open & free, all lockshields fully open. today bypass fully closed, its a gate valve & i must get round to fitting a proper bypass.
the boiler had appeared to reach temperature & had shut down on time delay. when it attempted to relight, it sparked, it lit ,the bottom 2 or 3 modulation leds began to light up. on ignition the pressure gauge surged from 1 to 1.5 bar, then it went back into time delay. it would continue to repeat this. the pump continues to run. when it lights for this short period the flow & oddly the return by the boiler get very hot.
if i shut the user control off & then on a few times to bring it out of time delay to fire the boiler, the red led lockout will begin to flash once every 2 seconds & diagnostic led 1 comes on. this indicates flow overheat which is associated with a circulation problem.
ive tried it with the bypass fully open too, the same.
i've removed the pump head & cleaned out a tiny bit of muck in the impeller.
i'm thinking it may be the pump but the boiler determines how fast the pump runs, & it does run. also if the pump cannot maintain sufficient boiler water flow to disperse the heat generated the red pump led should flash, & it doesn't.
all suggestions gratefully accepted.
i installed this boiler & converted the system to sealed 5 years or so ago for my auntie and have been tending to the little blighter regularly ever since. the latest problem to have arisen has been making me scratch my head a little today & i would be grateful for any helpful suggestions.
the fault described to me was that it wouldn't fire up for ch & i also gleaned that the hw was a little erratic too.
ive dropped around on a couple of occasions over the last week, flicked the heating on & boiler fired, rads warmed as i drank my tea. apparently i have magic fingers.
as usual as soon as i drive off problem returns.
had a bit more time to spend on it today. so fired it up & ch started. rads warmed though not completely. all trvs open & free, all lockshields fully open. today bypass fully closed, its a gate valve & i must get round to fitting a proper bypass.
the boiler had appeared to reach temperature & had shut down on time delay. when it attempted to relight, it sparked, it lit ,the bottom 2 or 3 modulation leds began to light up. on ignition the pressure gauge surged from 1 to 1.5 bar, then it went back into time delay. it would continue to repeat this. the pump continues to run. when it lights for this short period the flow & oddly the return by the boiler get very hot.
if i shut the user control off & then on a few times to bring it out of time delay to fire the boiler, the red led lockout will begin to flash once every 2 seconds & diagnostic led 1 comes on. this indicates flow overheat which is associated with a circulation problem.
ive tried it with the bypass fully open too, the same.
i've removed the pump head & cleaned out a tiny bit of muck in the impeller.
i'm thinking it may be the pump but the boiler determines how fast the pump runs, & it does run. also if the pump cannot maintain sufficient boiler water flow to disperse the heat generated the red pump led should flash, & it doesn't.
all suggestions gratefully accepted.