Heating Fault - Quick Check

[Ferdinand]

I think I need a plumber out, but I wanted to see if anyone had any ideas.

 

The circs are:

 

Hot water OK. Central heating is totally dead.

Bosch Combi Boiler, about 4 years old. 

Boiler is Greenstar 42Cdi Classic. A large one.

A new bathroom rad fitted a few months ago. Slight weep from one pipe joint.

Pressure reads marginally down (1.5 bar to 1.4 bar).

A Reset makes no difference.

No fault condition shown.

My Circuit Breakers are all where they should be.

 

I think I need a gas engineer, probably on Monday. Probably for a service which is due and pick up the fault.

 

(Just before mum comes back from hospital next week - typical).

 

Have I missed anything. eg Is there a fuse for the CH side controller that  ican just push back in?

 

Cheers

 

Ferdinand

 

[PeterW]

Zone valve on the heating ..?? Push the lever across manually to see if the micro switch is dead. 

[ProDave]

Is there a separate programmer or one built into the boiler?

Is there a room thermostat?

[PeterW]

From memory the Greenstar has a pump in the housing - if the pump has gone it’s a engineer job. 

[Ferdinand]

1 minute ago, PeterW said:

Zone valve on the heating ..?? Push the lever across manually to see if the micro switch is dead. 

 

Will try that, but 2 separate timers - upstairs is rads, so I would expect to keep one though there may be a funny pipework config.

 

2 minutes ago, ProDave said:

Is there a separate programmer or one built into the boiler?

Is there a room thermostat?

 

Separate room thermostats and 2 timers ? - both currently set to manual "on".

 

[Ferdinand]

Hmmm.

 

Upstairs rads are working after several resets.

 

Need to get  an eye test, so I will pop off and see if the ufh has heated through in an hour. 

[Nickfromwales]

23 minutes ago, PeterW said:

From memory the Greenstar has a pump in the housing - if the pump has gone it’s a engineer job. 

Secondary heat Ex is pumped, so no pump = no hot water too

 

42 minutes ago, Ferdinand said:

Hot water OK. Central heating is totally dead.

 

[Ferdinand]

OK. This is a PITA.

 

The good news is that the boiler has not died.

 

The kitchen room temperature took an hour to start going up (by 0.2 C).

 

Was out for the morning, and despite running the water circulation in the ufh at 55C and it on on manual, the kitchen temperature of the floor tiles has not gone above 25C (actually measured with a flat thermometer sitting on the floor so may read a little low), and the room temp has stuck at 19C, despite having the biggest Combi boiler in the Worcester Bosch range at the time on the end of it.

 

I need to be able to run the rooms where mum is at 23-24C throughout the year, *especially* in the winter.

 

The first place is to rebalance and checkover the UFH, but I do not expect that to be enough, and I suspect I am losing a lot of heat downwards (90mm Celotex iirc beneath the ufh).

 

So I am going to need something supplementary in place fairly pronto.

 

Hmmm. Rebalance and see.

 

Ferdinand

 

 

Edited November 9, 2019 by Ferdinand