Ideal logic 24 + heats radiators once then stops shows no fault !

SavageW · Nov 22, 2017

Alpha man said:
2 wires at the roomstat could be the issue depending on what roomstat you have!

I’ve heard this before does it cause issues with the room thermostat not switching once room temp has dropped? Like I say only heard this from colleagues before but interested to know what the reason is Alpha man

Chalked · Nov 22, 2017

Does the display on the boiler stay on when the room thermostat is turned down?

Alpha man · Nov 22, 2017

I use a lot of the dial type Honeywell room stats and they need at least a neutral for them to switch back properly,

Leezo · Nov 23, 2017

Leezo said:
Hi all
Looking for some help please!
It concerns an ideal logic plus 24 combi.
When you switch the central heating on it fires up fine. All the radiators get up to temperature. It then stops and the radiators cool down. All good! They do not come back on, even when the room is noticeably cooler/ cold. If left for a number of hours you can eventually switch the CH back on and it will go through this cycle again.
Weirdly if you set the TRVs to say 3 they will heat to 3 and stop. If you then turn it to 4 it will start up, heat to 4 and stop again and nor re start.
The ideal logic engineer has been out twice. He says there is no fault on the boiler (as no fault code shows) which has acted like this since new. Is about 2 years old now. Engineer also dais its probably the room stat. And because it's not ideal he won't check it. Anyway the stat has been replaced and the problem is the same. All the TRVs have been changed and still the same. System had been checked for airlocks/ slipped inserts etc.
Can anybody suggest what the problem might be, many thanks : )

Leezo · Nov 23, 2017

Leezo said:
Hi all
Looking for some help please!
It concerns an ideal logic plus 24 combi.
When you switch the central heating on it fires up fine. All the radiators get up to temperature. It then stops and the radiators cool down. All good! They do not come back on, even when the room is noticeably cooler/ cold. If left for a number of hours you can eventually switch the CH back on and it will go through this cycle again.
Weirdly if you set the TRVs to say 3 they will heat to 3 and stop. If you then turn it to 4 it will start up, heat to 4 and stop again and nor re start.
The ideal logic engineer has been out twice. He says there is no fault on the boiler (as no fault code shows) which has acted like this since new. Is about 2 years old now. Engineer also dais its probably the room stat. And because it's not ideal he won't check it. Anyway the stat has been replaced and the problem is the same. All the TRVs have been changed and still the same. System had been checked for airlocks/ slipped inserts etc.
Can anybody suggest what the problem might be, many thanks : )

Hi all, thanks for help so far... its not 2 wires. It was changed when the stat was changed. I have attached two pictures. one of the stat one of the single channel timer. The timer is Drayton LP711 and stat is Drayton RTS8.
In answer to the question does when the stat is moved up does the boiler start- yes it does..it will run for a short time then just stops again as before. Then goes cold