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Showing results for tags 'boiler fault'.
Found 3 results
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Hi The pressure on my vaillant ecotec plus boiler is creeping up by about 0.2 bar a day with the system OFF. I removed the grey handles on the filling loop and tightened both valves with a screwdriver, but the problem remains. Both valves have to be open on the filling loop to repressurise the system, so does this mean that both valves must be, leaking , which seems unlikely, or is it possible just one valve is faulty and if so, how do I find out which one it is? Or is there any other possibility? Any help appreciated. -
Hi So im getting an intermittent (once a day ish) F75 on my 2014 ish vaillant ecotec 831. Heating is on, all fine, for minutes -> hours then F75 appears and heating goes off. When I turn the boiler switch off and back on it goes away, HW and heating ok, then it comes back. Checked the electronic pressure sensor, it was always 3.8, so I changed it. New sensor works fine but intermittent F75 still present. Then I noticed the off the pressure was creeping up by about 1.5 bar a day, so I removed the handles from the inlet valves and tightened the valve with a screwdriver, problem solved, pressure stable at 1.6. But intermittent F75 remains. So im stuck any suggestions appreciated.
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I think I need a plumber out, but I wanted to see if anyone had any ideas. The circs are: Hot water OK. Central heating is totally dead. Bosch Combi Boiler, about 4 years old. Boiler is Greenstar 42Cdi Classic. A large one. A new bathroom rad fitted a few months ago. Slight weep from one pipe joint. Pressure reads marginally down (1.5 bar to 1.4 bar). A Reset makes no difference. No fault condition shown. My Circuit Breakers are all where they should be. I think I need a gas engineer, probably on Monday. Probably for a service which is due and pick up the fault. (Just before mum comes back from hospital next week - typical). Have I missed anything. eg Is there a fuse for the CH side controller that ican just push back in? Cheers Ferdinand
