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Boiler issues

CJM8515

Well-known member
Joined
Mar 8, 2014
Messages
9,292
Location
NJ
well its in the house not the garage, but still

have a natural gas boiler, a small trane unit installed per paperwork in 2008. since i bought this home 3 years ago it has been an issue with one thing or another. replaced heat pump, it has an on/off switch on it that went bad and now the latest-it kept staying on until it got so hot it would steam off.

forget parts-plumber and i discovered they dont make them as the unit is from home depot and likely a specialty built for them. all the supply houses he called told him good luck. we started by replacing the old fill valve, expansion tank, some piping and such. thing still steamed up and wouldnt shut down. the sensors he couldnt locate at any supply so he came up with the idea to install an aquastat (sp) and we set it for 180 and put a new gauge on everything since that failed too. unit has been running properly since, holding pressure of 12psi and 180F.

issue now is i have had this thing on and set the thermostat to 77F since about 8pm last night. the interior temp of the house will not go over 71F. it is approx 30F overnight here. before the boiler was having issues, it easily got the inside temp to 75F or higher in no time. seems like now it just wont keep up. UNLESS it was malfunctioning for some time (a year at least???) and that was why. I mean it should have heated the interior temps to at least 72-74F id think by now.

Unit is working fine, turns on and off by thermostat and such. idk if the external aquastat is causing an issue here. only thing i can think of is the probe in the well is causing the unit to kick off sooner and thus not run it long enough?

gonna call the plumber later today but I figured maybe someone here has an idea. i suppose at worst its just so cold that no matter what i do it aint keeping up now that its running properly. i had an hvac co come and fix this thing previously (this time was a friend of a friend) and they had explained to me the unit was literally JUST big enough at best to heat the house as it was to small really.
 
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briwod

New member
Joined
Apr 19, 2013
Messages
4
Location
Northwest, Ohio
You probably need to balance the flow through the system since the inability to heat is likely from low water flow to the heating devices throughout the house. If the system was previously running too hot it is likely that someone reduced the flow to prevent overheating. Now that the boiler is producing the proper temperature you will need to adjust the flow to accommodate the new water temperature.
 
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CJM8515

Well-known member
Joined
Mar 8, 2014
Messages
9,292
Location
NJ
pumps working-it only has 1, pressure is 12psi and temp is 180F. if i turn up the heat it will cycle no issue. it finally warmed up during the day today, but it was quite cold last night. the house is so so insulated as well, walls are junk and crawlspace is meh. i redid the attic however and it helped the past winter or so

You probably need to balance the flow through the system since the inability to heat is likely from low water flow to the heating devices throughout the house. If the system was previously running too hot it is likely that someone reduced the flow to prevent overheating. Now that the boiler is producing the proper temperature you will need to adjust the flow to accommodate the new water temperature.
what would I adjust to do so?
 

Jackfre

Well-known member
Joined
Dec 26, 2010
Messages
4,406
Location
N CA
You may be air bound. ARe you getting any noise from the baseboard? I cut out the old Amtrol unit and put in a Spirovent and the difference in the system was remarkable.
 

u3b3rg33k

Well-known member
Joined
Dec 18, 2017
Messages
4,047
You may be air bound. ARe you getting any noise from the baseboard? I cut out the old Amtrol unit and put in a Spirovent and the difference in the system was remarkable.
+1 if the system was opened for service it may not have been bled properly.
 
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