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  1. R

    Vaillant ThermoCompact won't start after system refil

    Does anyone have the installation guide for this model in electronic format Vaillant Thermocompact VU GB 282/1 E - would be most useful - tks Ray
  2. R

    Vaillant ThermoCompact won't start after system refil

    Hi Dave - Was something I checked as soon as we ran into problems. All valves are open cheers Ray
  3. R

    Vaillant ThermoCompact won't start after system refil

    Hi Guys. Any further ideas on this one - need to get it fixed soon or wife will move out :-)
  4. R

    Vaillant ThermoCompact won't start after system refil

    Hi Agile, The boiler feeds into a megaflow water cylinder, so I'm guessing that turning on the hot tap won't have the same effect as on a combi boiler. The water temperature in the system is showing at 20 degrees now, so I guess it should already be trying to turn it's self on. Please let...
  5. R

    Vaillant ThermoCompact won't start after system refil

    Hi Gasguru and Tony, Tks for the replies. Ok Gasguru - i've watched the lever, and it does move clearly up and activate the red switch, but the boiler still switches off before igniting. Tony - What is a DHW setting. Can you talk me through how to do what you've recommended. Cheers Ray
  6. R

    Vaillant ThermoCompact won't start after system refil

    OK - have re-pressurised the expansion vessel. Still showing the same problem on start up. Is there anywhere else that needs to be bled except for the AAV? Tks Ray
  7. R

    Vaillant ThermoCompact won't start after system refil

    Thanks - will give that a go now. The boiler was working just before we drained the system, and didn't work again after refilling, so I'm guessing it's probably not a block - just an air lock. Do you know if there is anywhere else that needs to be bled in the boiler apart from the screw cap...
  8. R

    Vaillant ThermoCompact won't start after system refil

    Ah - I see. Is there anything I can do, or do I have to get a pro in to sort it out. As I drained it, I did notice that there was a drop in the system pressure Cheers Ray
  9. R

    Vaillant ThermoCompact won't start after system refil

    Hi Tony, I've loosened the cap and it didn't have any affect. On the thing at the top - it did have a car valve type valve which I depressed until no more hissing sounded - have I messed it up? Tks for the help Ray
  10. R

    Vaillant ThermoCompact won't start after system refil

    I'm not sure the exact model (was in the house I moved into)- but the book says VU 142/1 E, 182/1 E, 242/1 E, 282/1 E Recently I drained the system to add two new radiators. When finished I refilled the system, but when I try to start the boiler, it won't start. When the power is turned on...
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