System flush - cold?

[Neil Ives]

Hi, new here.
The heating system cleaning fluid I've got advises circulating at preferably room temperature. The combi boiler is a Viessmann W-100. Is it possible to get the boiler to circulate the water without the gas firing up? Thanks for any advice.
Neil

 

[ShaunCorbs]

Other than to turn the boiler thermostat/ temperature down no

 

[Neil Ives]

Other than to turn the boiler thermostat/ temperature down no

Many thanks Shaun,
While I was out walking the dog I realised how simple it is; just turn the boiler temperature down low!