I should add it is an American Standard gas boiler (hot water/radiator)
that is probably 35 - 40 years old.
The first pro to arrive at my house said it was the gas valve, but didn't
have the part and decided it wasn't worth his time (no charge). The second
pro was with a subsidiary of the local utlity company. He got the furnace to
ignite and the heat is on ($79 no parts needed), however he said the
circulator pump was rusted in place and recommended getting a plumber.
Now in the 16 years that I've been in the house I don't ever recall
hearing a circulator pump in operation. This might sound like a stupid
question but do I really need to get this fixed?
The heat feels good!
Not hearing the pump is actually a good thing. Look at it yourself, it's
somewhere near the boiler with a pipe going in and another going out.
Aside from the boiler providing the heat, the pump is crucial on getting that
heat to where it's needed - from the boiler to the radiators and back.
If you loose the air bubble and have to drain something is wrong with
your system and it will not have expansion capabilities and can
overpressure. Water in it when cold - tank is to small, or it does not
drain properly- blockage, or bad autrotrol valve, or bad auto feed, over
filling system. Pressure - altitude gauge may be bad if you rely on
that for monitoring and manualy feed. Often pressure relief will
release on even a partialy full tank from overpressure on a fully hot
boiler, your relief valve could be bad also. Maintain overpressure and
boilers do not last. Start with a new presure gauge and set boiler to
On Tue, 16 Nov 2004 08:02:03 -0600, email@example.com (m Ransley)
The expansion tanks most likely to leak air are those with a glass
tube level indicator. The service tech is supposed to open the hand
valves, check the level, then close the hand valves. If the hand
valves are left open, air will eventually escape past the upper glass
tube gasket. Seems like I have to close hand valves everywhere I go,
because the guy who was there before me left them open.
Gary R. Lloyd CMS
HVACR Troubleshooting Books/Software
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