Hi, hoping for some advice on problems I’ve had with a combi boiler.
I have a Vaillant ecotec plus 831 serving 4 radiators and 1 towel rad plus water to a bathroom and small kitchen.
Only recently bought the house and there were signs of leaking at all rad thermostatic valves and the stains were brownish. There were also historic brown stains inside the boiler and on the shelf below it (they looked like treacle). I had a initial problem with it not working at all which a plumber solved by changing the programmer, albeit only two rads plus hot water then worked.
Had a different plumber round yesterday to change all the valves, add a magnetic filter and flush the system. I’m not sure how much flushing was actually done but he obviously drained and refilled and everything was fine for a couple of hours i.e. both hot water and all rads were working.
Then it stopped. Boiler showed F75 fault and boiler pressure gauge was at ‘0’ (its one of the small gauges that doesn’t have numbers, just a small disk with colour coded sections). After speaking to the plumber on the phone I tried filling up the system by opening the taps underneath and could hear water flowing into the system. After at least 4 minutes of this the needle eventually started to move very slowly up but still only 1/2 way up the red section. At this point black/brown water started flowing through the tundish.
Really hoping someone may have some ideas of what to try next! Thanks in advance.
I have a Vaillant ecotec plus 831 serving 4 radiators and 1 towel rad plus water to a bathroom and small kitchen.
Only recently bought the house and there were signs of leaking at all rad thermostatic valves and the stains were brownish. There were also historic brown stains inside the boiler and on the shelf below it (they looked like treacle). I had a initial problem with it not working at all which a plumber solved by changing the programmer, albeit only two rads plus hot water then worked.
Had a different plumber round yesterday to change all the valves, add a magnetic filter and flush the system. I’m not sure how much flushing was actually done but he obviously drained and refilled and everything was fine for a couple of hours i.e. both hot water and all rads were working.
Then it stopped. Boiler showed F75 fault and boiler pressure gauge was at ‘0’ (its one of the small gauges that doesn’t have numbers, just a small disk with colour coded sections). After speaking to the plumber on the phone I tried filling up the system by opening the taps underneath and could hear water flowing into the system. After at least 4 minutes of this the needle eventually started to move very slowly up but still only 1/2 way up the red section. At this point black/brown water started flowing through the tundish.
Really hoping someone may have some ideas of what to try next! Thanks in advance.