Combi boiler going out, but only with heating on?

[james]

Our boiler has been fine all summer, supplying hot water on demand. The last couple of times I've switched it to heat + water though, it goes out after around 15-30 minutes of the heating being on. I checked the pressure and it is a bit over 1bar (the pressure valve broke earlier in the year and was replaced by an engineer, he told me about checking the dial!).

It seems almost like it is overheating (or thinks it is). The temperature dial (which actually seems to make no difference to anything) is on 3.5 of

1-5.

Any thoughts, or shall I just call the landlord? If it's something simple I'm missing I'd rather tackle it myself in the evening otherwise I have to take time off work to be in for the chappy! It's a Worcester model (240 I think)

James

[Ed Sirett]

It may be that all the rads are closed (or the TRVs stuck) and so there is little or no flow through the boiler in only CH mode.

It is common practice for Landlords to supply workmen with keys unless the tenant expressly forbids that. Even then that is usually out of respect for the tenant as the 'standard' agreement usually states that the Tenant is to allow "the Landlord or his agents" access. So there is no need for you to take time off work. You are paying in the rent for the boiler to be fixed so why no use the service!