Forced hot water. Temp not getting above 58 degrees

Mark_108

Hello, I have baseboard heat with 2 zones. I just recently changed my thermostats to digital thermostats. I also turned down my furnace to 120 degrees. Everything was fine for a while (about 2-3 weeks). Last night was cold. I turned the heat up to 65 degrees. My temp stayed at 58. It never got hotter even though the heat was turned up. The only thing I can think of is that the furnace temp is too low. Does that make sence? Anything else to check?

kevin coppinger_4

that's a good...

start..why did you turnit down so low? temps below 140 are not good for a conventional boiler....kpc

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scrook_2

Boiler temp's TOO LOW!

It's a boiler not a furnace BTW; furnaces heat air, boilers heat (or boil, for steam) water, but that's neither here nor there.

120°F is TOO COLD and will cause condensation on the fire side of the boiler, in the flue pipe and chimney -- NOT GOOD -- unless it's a condensing boiler by design -- if not, 140° to 180°F is a good range generally.

Baseboard radiation particularly likes hot (140-180°F) water, (so doesn't benefit as much from a condensing type boiler as say cast iron hot water radiators of in floor radiant) especially at very cold/design temperature conditions (e.g. New England yesterday), otherwise your house will stay cold. Also baseboards collect dust -- you might vacuum/blow them out too.