Zone short cycles and t stat reads lower than setting

davidheat

I have a Utica gas fired hot water boiler and one of my zones cycles very quickly and then shuts off. The t stat is set at 68 and it reads as 61 actual temperature in the room.

any thoughts as to what I can check to try and correct?

Zman

Alittle more info

Do you have zone valves or circulators?

Can you post a picture?

Carl

Paul48

Thermostat

Eliminate the thermostat by jumping it out, at the thermostat.Beyond that we need the info. There's a couple other possibilities.

unclejohn

Check

The heat anticipater setting on the tstat.

davidheat

Pictures

I have Taco circulating pumps on each zone with Taco flo-chek valves. I have changed the caps on the flo cheks and that doesn't seem to fix it. Thanks

Pictures attached.

davidheat

Checked t-stat

I checked the t-stat and the settings were correct, I would appreciate any help I can get. Thanks.

John Mills_5

Stat?

Mechanical or digital? 

davidheat

Stat reply

Hi John it is a Honeywell T87 t stat.

RobG

Zone Pump

Is the boiler firing up on a call from the t-stat? If so, is it shutting down on high limit? If so, it sounds like your zone pump is not operating or the zone is air bound.

Rob