This is my 1st post here, hope I don't look like an idiot. Last week
here in NE we had biblical flooding. Basement flooded, oil furnace
cut out. I reset the burner, and its been fine, but I have one
radiator in the bedroom on the 2nd floor that won't get past luke
warm. All other radiators on the 2nd floor are hot. I bled the rad,
it ws full of water...so I tried this...I turned off the valve at the
bottom and bled about 5 gallons. Then I blasted the heat and turned
the valve back on, and bled it again. It got a little warmer, but not
What is the problem here?
On 7 Apr 2004 08:00:35 -0700, email@example.com (Bluesman)
On my hot water radiators, sometimes air gets trapped in the top part
of the radiator. There's a very small valve on near the top of the
radiator that opens with a small key (available at a hardware store)
that allows the air to bleed out. Not quite sure if that's what you
already did from your description.
Also, make sure the fill valve for the system near the boiler is open.
Otherwise the system will be low on water now that you removed 5 gal.
I know, it sounds dumb to mention it, but two plumbers have left mine
closed after fixing other problems.
Many systems have a steel tank with a bladder in it that keeps the
system slightly pressurized. If yours has such a tank (mine does) you
might try checking the pressure. If it is not the "right" pressure
(mine has the pressure indicated on the side of the tank) you need to
pump it up with air.
Finally, if the system has a water circulating pump, as mine does,
make sure it is working.
I have one room with two radiators, and for years I have kept one
turned off. This winter it got so cold in the room I opened the valve
on the other one. It took quite a while for this radiator to warm up
at all, but after a day or so it finally did. Once it got hot, it
worked fine from then on, cooling down at night, heating up the next
day, in response to the thermostat. Not sure why it didn't work right
away -- perhaps a clogged valve that opened up, perhaps the pressure
issue mentioned above (the pressure in the system was low).
That's all I know. Just a homeowner, not a plumber or HVAC guy.
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