I have a Boilermate II, fed by Myson 80SI, which are both now 13 years old.
Replaced boiler-pump* (on Boilermate) approx 2 months ago after it became noisy following a drain-down & refill. Also added Fernox MB1 inhibitor.
Everything appeared ok for past 2 months, but 2 days ago hot water became intermittent and now no hot water other than small initial amount when taps turned on. CH appears fine, but boiler is overheating (metered thermostats) and runs for a while before this occurs. Boilermate demand neon stays on until boiler cools and begins supplying again. Header tank on Boilermate is ok - turned supply to header off and drained of a gallon of ch water from downstairs. Level in header tank fell by a gallon.
*With identical Grundfos pump running at highest speed.
Would appreciate any advice from Boilermate gurus - there aren't many of you about! (Gledhill aren't currently answering the phone)
Replaced boiler-pump* (on Boilermate) approx 2 months ago after it became noisy following a drain-down & refill. Also added Fernox MB1 inhibitor.
Everything appeared ok for past 2 months, but 2 days ago hot water became intermittent and now no hot water other than small initial amount when taps turned on. CH appears fine, but boiler is overheating (metered thermostats) and runs for a while before this occurs. Boilermate demand neon stays on until boiler cools and begins supplying again. Header tank on Boilermate is ok - turned supply to header off and drained of a gallon of ch water from downstairs. Level in header tank fell by a gallon.
*With identical Grundfos pump running at highest speed.
Would appreciate any advice from Boilermate gurus - there aren't many of you about! (Gledhill aren't currently answering the phone)