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Mend Glow-worm Optimax HE Plus Home Heating Systems

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Mend Glow-worm Optimax HE Plus He Boiler Showing

Optimax he plus boiler showing F37?

Tried loosening both black valves, no hissing or system filling, pressure gauge reading 1.5. Not sure what else to try

R Clark
December 2014
Glow-wormGlow-worm Optimax HE PlusHeating, Home Heating SystemsHe Plus Boiler Showing

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