my heatslave 18/25 provides hot water, but now is not heating the underfloor heating

[crerarg]

my heatslave 18/25 provides hot water, but now is not heating the underfloor heating.
When the thermostats show the flame symbol the boiler does not come on, it is fine for hot water.

Graham

 

[SimonG]

Re: my heatslave 18/25 provides hot water, but now is not heating the underfloor hea

Could be a few things.

Maybe expand a little?

Maybe worth getting somebody in

 

[Jay The Plumber]

Re: my heatslave 18/25 provides hot water, but now is not heating the underfloor hea

do you have another heating zone with rads that is working?