room stat calling for heat,boiler going off at 18 degrees,any ideas

[wnjswozo]

Hi all

Got to go to a job tomorrow,just trying to get a head start
PROBLEM:Lady says she comes in switch room stat,which is digital,to 21Dgre
boiler goes out at 18Dgres, then fires up,and goes off,does,nt go off
completley but room stat not going above 18Degres,its a standard combi
ive been to it a few years back,but cant rember model,something like sime
Any ideas

 

[SimonG]

Boiler stat? Doesn't matter what temp the room is if the water is upto temp in the boiler.

 

[wnjswozo]

Hi all

Got to go to a job tomorrow,just trying to get a head start
PROBLEM:Lady says she comes in switch room stat,which is digital,to 21Dgre
boiler goes out at 18Dgres, then fires up,and goes off,does,nt go off
completley but room stat not going above 18Degres,its a standard combi
ive been to it a few years back,but cant rember model,something like sime
Any ideas

ment to add the boiler stat is on full on boiler

 

[AWheating]

circulation problem? boiler stat? has the boiler been serviced/ checked regular?

 

[kay-jay]

Digital stat? Its not a wireless one is it? Not keeping it on a table beside a rad

 

[R1CKY]

Link the stat out, leave for a day or two. If it stops playing up, replace the stat, if it works fine, you have a boiler issue.

Sounds to me as if the stat is in a cold part of the house and the boiler is getting up to temperature on the control stat. Stats in large open hallways will take hours to get up to 21 degrees.