I have a Drayton Lifestyle LP111 Si programmer and Siemens RDH10RF thermostat connected to a Vaillant Ecotec Plus combi boiler.
The programmer's LED display is showing a message 'ser due' and is giving off a beeping alarm that stops if you push the 'dvance' button.
The heating is not working but the hot water is. The LED display on the combi shows the code s.30 when you push the 'i' information button. The manual says this code means 'no heating demand from external controls'
The thermosat seems to be working fine - both the green light and the amber one are glowing steadily.
Any advice would be very gratefully received as it is coooold!
The programmer's LED display is showing a message 'ser due' and is giving off a beeping alarm that stops if you push the 'dvance' button.
The heating is not working but the hot water is. The LED display on the combi shows the code s.30 when you push the 'i' information button. The manual says this code means 'no heating demand from external controls'
The thermosat seems to be working fine - both the green light and the amber one are glowing steadily.
Any advice would be very gratefully received as it is coooold!