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jayvee 04-13-2010 05:52 PM

blockage in heating system
I live in a 3 story house that is heated with hot water. We are getting heat in only the back half of the house. Heat will not flow to front half. We have replaced pump, thermostat, and installed a bleeder on the feed line to the front of the house. Have bled the system several times with no success in getting heat to return. Could this be a mechanical issue in the radiator valves? If airbound, bleeding does not seem to work.

Bob Mariani 04-13-2010 07:56 PM

it is air bound. you may need to increase the pressure to force it out. Also you may need to add bleeder valves at the heat units.

Scuba_Dave 04-13-2010 08:31 PM

So when you bleed you are getting water out of the bleeders ?

jayvee 04-13-2010 08:56 PM

blockage in heating system
Yes, water did come out of radiators when bled. Also, we did install a bleeder valve and still no heat. Have you heard of a "swirl bleeder?"

Scuba_Dave 04-13-2010 09:06 PM

When it calls for heat is the recirc pump running ?

jayvee 04-13-2010 09:10 PM

blockage in heating system
yes, the circulating pump is running when it calls for heat

jayvee 04-13-2010 09:12 PM

blockage in heating system
Is it possible that there is a mechanical blockage in one of the radiator stem valves? If so, how can I determine which radiator is blocked?

beenthere 04-14-2010 06:01 AM

Do you have 1, or 2 circulators? Is it a zoned system, that you have 2 thermostats?

If you have 2 zones/circulators. Is it possible that you have the circulator installed pumping in the wrong direction?

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