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How do I open the Potterton prt 100 thermostatic control?
Already Tried: have inserted screwdriver in two slots to release lower part, there is still something holding the cover at the top
Hi I am Rick, UK Plumber, and I specialize on Boiler problems, The PTT 2 cylinder stat and the PRT 2 room thermostats all open from the bottom and hinge up to the top the demount from the demountable top hinge and contacts, the PRT 100 I think is the same, Rick