Radiators not heating in new build

[bramish]

Hi,

Just moved into a new build that has a Honeywell T3 wired thermostat installed, connected to a Logic Combi ESP1 35 boiler.

I wanted to test the heating out before I actually need it on regularly.

Set the programme to come on for a couple of hours now at 24C (it's currently 21 in the house). Flame icon is displayed on thermostat. All radiator valves are open. Boiler fires up, pressure is 1.5, pipes that should feel hot do.

But all radiators remain cold.

Same issue whether I set manual or auto on thermostat.

Is there anything else I can check before I contact my landlord?

Thanks

 

[Murdochcat]

Does the central heating have a timer ? It needs to be on to respond to the room stat

 

[CountryFan]

Just check the return is open under the boiler - maybe post a photo of the underneath?. Are any of the radiators heating up?

 

[CountryFan]

Does the central heating have a timer ? It needs to be on to respond to the room stat

I doubt it. Being a programmable room stat, should be sufficient and the boiler is firing according to OP.

 

[bramish]

Does the central heating have a timer ? It needs to be on to respond to the room stat

Not as far as I know.

 

[bramish]

Just check the return is open under the boiler. Are any of the radiators heating up?

What's the return? None of the radiators are heating.

 

[CountryFan]

What's the return?

There’s is a flow and return pipe under the boiler with isolation valves, both need to be open. Post a photo of the underneath. Also, post a photo of the front of the boiler please.

 

[bramish]

Ah yeah, it's open I think - both the left and right pipe heat up when it's on.

Also the 00 on the boiler says 51C when the heating is on.

 

[CountryFan]

Ah yeah, it's open I think - both the left and right pipe heat up when it's on.

Also the 00 on the boiler says 51C when the heating is on.

Ok, yep, both are in the open position. No in-built timer, but irrelevant imo as it’s firing and in ch mode. The only other 3 I’d say is:
1: air lock - but I would expect some heat to some rads
2: lockshield valves closed - you said all valves are open (which will be trv’s). Lockshield Sam should have a white cap on - removable by hand or screw - if you can or want to post a photo? Otherwise just get someone out under the defect agreement
3: it’s on zonal Heating (x2 thermostats) and one or both not opening

 

[Murdochcat]

You say you are a tenant. Get on to the landlord

 

[bramish]

You say you are a tenant. Get on to the landlord

That's the plan. Just wanted to check I wasn't overlooking something.

 

[bramish]

Ok, yep, both are in the open position. No in-built timer, but irrelevant imo as it’s firing and in ch mode. The only other 3 I’d say is:
1: air lock - but I would expect some heat to some rads
2: lockshield valves closed - you said all valves are open (which will be trv’s). Lockshield Sam should have a white cap on - removable by hand or screw - if you can or want to post a photo? Otherwise just get someone out under the defect agreement
3: it’s on zonal Heating (x2 thermostats) and one or both not opening

It is on zonal heating. One thermo upstairs and one down. How does that affect it?

 

[ericmark]

I would guess by-pass valve stuck open, but not down to you to play with, contact landlord.

 

[Razor900]

Are the pipes warm going into the bottom of the rads? Might have just not been bled properly

 

[bramish]

Are the pipes warm going into the bottom of the rads? Might have just not been bled properly

They are not