My Boiler is Supplying Hot Water But No Heating (Or Vice Versa)

If your home has a heat only or system boiler, it’s important to know they cannot tell the difference between a demand for heating hot water and a demand for central heating like a combi boiler can. 

If you do have this problem with a system or heat only model you need to contact a plumber, not your boiler manufacturer. This is because a system or heat boiler only works off one demand and that is to heat up water — it’s the controls that do the rest.