Boiler does not circulate water

sanshonomiFebruary 26, 2014

I live in an old house from 1930's with a boiler (22 years old) and hydronic radiator. The radiator has three zones (2nd, 1st floors and basement). I was away from the house for a few days and turned the boiler off. When I came back, I found that water does not circulate the second floor. I initially thought there must be air pocket created but opening the breeder on the 2nd floor did not do anything. Then I figured that a section of the pipe may have frozen. I am planning to wait until the spring comes. But could there be another reason? I started to double because it was warm for a few days (>40F) last week and that did not do anything.

Thank you for reporting this comment. Undo
ionized_gw

Does each zone have its own pump or are they controlled by valves with a single pump? Is the circulator pump starting up when heat is called for on the second floor?

    Bookmark   March 1, 2014 at 8:11PM
Thank you for reporting this comment. Undo
sanshonomi

Hi thank you for replying. There is only one pump. Three zones have an individual controller but has no shutoff valve. The pump does responds to when I turn the temperature setting of the second floor up. But hot water does not circulate and the pump kept on forever, so I am keeping the setting low.

    Bookmark   March 2, 2014 at 11:14AM
Thank you for reporting this comment. Undo
ionized_gw

See if you detect opening and closing of the individual control valves as they respond to the thermostats. It might be easier to detect opening and closing if you have another loop operating since that eliminates the pump starting at the same time. This might be most easily done with a helper operating the thermostats or disconnecting the thermostats at the boiler and closing the control circuit there.

    Bookmark   March 2, 2014 at 12:05PM
Thank you for reporting this comment. Undo
sanshonomi

I am taking back my statement that the controller for the second floor is working... I have turned up the thermostat on the second floor all the way and the pump did not kick start. Could this mean that the controller had gone bad? I plan to do a few more control experiment tonight. I still cannot eliminate the possibility of frozen pipe, because if you manually turn on the valve to the second floor while the pump is on, water still does not circulate to the second floor.

    Bookmark   March 3, 2014 at 6:36PM
Sign Up to comment
More Discussions
Can you vent a cooking range into a chimney?
I know you can't vent into fireplace chimney or one...
BrightFutureFoods
Central Air OR Mini-Split
Hello everyone, We bought our house 2 years ago (1938...
Bongo
company insists on all payment in advance
Having 2 mini-splits installed, have already paid half...
gramarows
gas wont come on. forced air gas fired furnance
the Furnace was starting then running a couple minutes...
waterguytexas
Honeywell th6320R Thermostat
My Honeywell TH6320R thermostat (communicating with...
zver11
Sponsored Products
Vig Furniture - Verona - VR3 Black Made in Italy TV Entertainment...
Great Furniture Deal
Ar Ruthiane Brushed Nickel 48-Inch Ceiling Fan with Mahogany Blades
Bellacor
Progress Lighting Down Rods AirPro 60 in. White Extension Downrod P2608-30
$46.62 | Home Depot
39" Matthews Dagny Chrome Double-Headed Ceiling Fan
Lamps Plus
Biofresh Memory Foam Mattress Topper - Twin
$159.00 | FRONTGATE
84" Fanimation Odyn Brushed Nickel LED Ceiling Fan
Lamps Plus
Upholstered Astrid Queen Platform Bed - Blue
Zuri Furniture
Twist Coffee Table
$489.99 | Dot & Bo
© 2015 Houzz Inc. Houzz® The new way to design your home™