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    Motorised valve or boiler problem?

    I suspect the Danfosss HSA3 Actuator on my 3-way motorised valve, but before replacing it, I'd like to run through the symptoms to see if it might be a problem elsewhere (I had a new Vaillant ecoTEC 428 boiler installed last year, so I want to rule that out first). The problem is the house is...
  2. G

    Danfoss HSA3 again!

    I suspect my Danfosss HSA3 Actuator, but before replacing it, I'd like to run through the symptoms to see if it might be a problem elsewhere (I had a new boiler installed last year, so I want to rule that out first). The problem is the house is getting too hot. Today, the room stat was off...
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