diagnosis

  1. E

    Eco Elite 30 short cycling on CH

    Hi Folks, I have a challenge with a Main Eco Elite 30 Combi which is short cycling on the CH. Water works fine. As soon as you have call for heat, the boiler fires up, modulates, but jumps very quickly (about 30 seconds or so from 40'ish all the way to 70, burner disengages putting it the...
  2. Space pigeon

    I'm looking for some help diagnosing an issue on my 2007 2.2 hdi Citroen relay

    I have had some issues with getting black and grey smoke coming from the exhaust. I thought it might be the mass meter sensor but I diagnosed it isn't that. I thought it might be the egr, I removed and cleaned this and still getting the same issue. I did find that there is a substantial amount...
  3. Martin Bryant

    Veritas 8 - Unexplained two tone beep when unset

    Just bought a house with the Veritas 8 alarm fitted. Code seems to work fine and I've identified the 4 zones in use. I've turned off the chimes but when unset I occasionally get a two tone beep for no obvious reason. As far as I can tell, there are only door switches fitted. No PIRs or other...
  4. B

    2005 Volvo S40 1.8 smoke from exhaust

    I recently bought a 2005 1.8 Volvo S40. When I was buying the car everything seemed to be fine. The car has done 87,000 miles. When I got the car home I was driving it about for a bit I reved the car and noticed a plume of smoke, it was unclear whether it is blue or white. It was a cold enough...
  5. engineerSteve

    Diagnosing heating system fault

    Hello, I have a situation that may resonate, I think there could be two faults: Situation: excessive oil being used in heating/hotwater system, pump never turns off, radiators often hot even when programme is set to off/off. There is a drayton motorised valve on a Y valve Often one can hear...
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