I have had a good try at searching the web for a few answers on this, but surprisingly few thoughts about what ought to be a common problem. Most seem to put up with it, or complain that British Gas can't fix it, so I will ask for some thoughts here.

When my gas boiler system motorised valve operates any DAB radio drops out for the 12-15 seconds and now the super fibre internet router also trips off and then does its usual power back on. Funnily enough, the TV seems unaffected. The DAB radio drop out has been going on for a few years.

The various web answers point to thermostats, boiler gas valves and motorised valves as being the guilty objects. But no thoughts on suppression given. It cannot be the roomstat (happens in the Summer), I have a newish Worcester Greenstar boiler, but the interference does coincide with the actuation and duration of the motorised valve when the hot water tank thermostat seems to be ending its call for heat.

Apparently there are resistor/capacitor sets in some motorised valves. Do you think I can try putting a capacitor (or pair) across the motor feed cable supply? What size and type and do I affix a L-E and a N-E pair?

Or have I got to dismantle the motor drive and replace any capacitor that might be lurking in there?

It might be the tankstat if that can take 12-15 seconds to trip off, but unlikely perhaps.

Norm

Edited By norm norton on 01/09/2019 12:05:45