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Vaillant boiler clock not working

My vallient boiler is just five years old and have just putt he heating on for the first time this year. The heating and boiler work fine but when l change the timer clock which is on the front of the boiler and switch heating to'timer' the **** does not go round or move thus the heating will not come on unless l switch tot he 'on' position. I cannot put the heating on timer anymore. thank you

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  • Master
  • 2,049 Answers

Your timer clock may need to be replaced.

Posted on Aug 12, 2017

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SOURCE: vaillant 831 combi boiler timer help

check to see the time clock is set with the clock symbol. there are three settings on analog clocks I , O and clock the I setting is constant running, the O setting is off and the clock setting is timer.
also try setting the thermostat up higher to see if the boiler fires.

Posted on Mar 30, 2009

mrhotandcold
  • 248 Answers

SOURCE: Vaillant boiler no heating or hot water

refere to manual check for override switch loss of pressure no problem re-pressurise and check for leak top of rad valve good place to start

Posted on Oct 11, 2009

  • 254 Answers

SOURCE: boiler working but radiators cold

Seems that you may have bad circulation pump.

Posted on Feb 25, 2013

Testimonial: "Thanks a lot for your help. Well, we couldn't figure out what/where the problem was. So we had to ask for professional help. And it turned out to be a faulty diverter valve. They have replaced the valve and our heating is back again!"

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