Honeywell CM927 and temp problems

[Robzey]

Hi everyone.

About 7 weeks ago i installed a cm927 programmer on my ferroli boiler and setup it to run on the programmer with varying temps at different times of the day etc and it all worked fine.

However since the real deep freeze of last 2 weeks there have been problems.

The stat is set to heat up to 22degrees and shows a temp of about 19degrees.

Boiler fires up for about 90 seconds and then goes off. Then few mins later it does the same again meaning it never reaches 22 degrees and the house is a bit chilly.

Is it something in the settings i need to change? (Engineer settings maybe?)

Cheers

 

[bengasman]

sounds like lack of flow

 

[gas4you]

Is the 'flame' on the 927 stat present all of the time and if so is the receive light on on the receiver?

If so I would tend to think it is a boiler problem.

 

[Robzey]

Yup there is green light (Relay on) on al lthe time on receiver box and flame showing on cm927.


Lack of flow........

Pump? There is pressure in the system its at 1 bar