Central Heating randomly coming on

davidthompson1

Good morning,

Recently my boiler has started coming on at random times for central heating, heating the radiators up and making the place feel like a sauna. Woke up a few times during the night realising what was happening.

My thermostat control is a Salus RT300RF and boiler is a Greenstar 25Si Compact Combi Boiler located in the kitchen.

My thermostat is always set to 17 degrees but the boiler keep firing up the heating even when the thermostat is reading 23 Degrees.

I have checked the boiler setting and there is no additional on/off times set its all working from the thermostat. I have also noted when the boiler is firing up the central heating the "heating" symbol on the thermostat doesnt display.

The boiler temperate indicates 32 degrees so it doesnt appear to be frost protection.

Any ideas what the problem could be?

Appreciate everyones time.

Blot

Do you have a zoned system with motorised valves ? The problem could be the electrical contacts in the motor head not making and breaking correctly due to wear. Also wireless room stats can compound the problem by giving bad or poor signals.

Jonesya

My first guess would have been a frost protection system because when it kicks in, it bypasses the timer controls and starts the system (often appearing randomly) with no other indication.

But with the boiler in the kitchen that seems unlikely, unless you've got other parts of the system like the pump or diverter valve in unheated areas with possibly their own protection.

neilmcl

According to the Salus FAQs: "My heating comes on at random times... Why? - You may be getting RF interference, please see our video on our website on how to change the RF address code"

https://www.youtube.com/watch?v=KwSEDw99Juc

southcoastrgi

Salus suffer from loads of issues