boiler is short cycling


Old 01-12-10, 06:15 AM
Thread Starter
Join Date: Jan 2005
Location: NJ
Posts: 84
Received 0 Votes on 0 Posts
boiler is short cycling

My friend has a new gas fired Utica boiler and steam radiators throughout the house. just replaced the same boiler that was 20 years old. when it builds pressure, the cut off valve shuts down. Pressure builds up to 2.5 pounds and cuts off. when the pressure drops to .5 pounds then it refires again.
The vents have been replaced and the thermostat has been taken out of the equation along with a new pressure regulator.
Any suggestions?

thanks, JB
Sponsored Links
Old 01-12-10, 06:53 AM
Temporarily Suspended
Join Date: Jul 2008
Location: NY
Posts: 10,986
Received 0 Votes on 0 Posts
My pressuretroll is set to the same limit, 2.5. That shouldn't be a problem. Did the problem occur before the vents were replaced? What about the low water safety.
Old 01-12-10, 04:21 PM
rbeck's Avatar
Join Date: Jul 2007
Posts: 2,465
Received 2 Votes on 2 Posts
Other than the cut-off pressure being too high whats the problem. It is doing what it is suppose to do. The new boilers will normally cycle due to making steam much faster.
Were all the radiators measured to determine proper boiler size? If not maybe boiler is over sized. If properly sized I would suspect it still would cycle.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: