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I have a oil heating system in a two story house, the rads in the upstairs are heating well, but the down stairs rads are only heating at the top and are cool at the bottom. I have replaced the pump, ( and drained the system ) but to no sucess, when the pump for the back boiler on the solid fuel fire is switched on with the oil boiler pump the rads down stairs heat up fine, but when switched of they cool down at the bottom again, this issue has just came up and is not the case since the heating system went in. Please help ???????
p.s. if you have drained it you need to add a Corrosion Inhibitor chemical. Sentinel and Fernox are good brands. It should cost you the equivalent of £15 for a litre bottle. You have to drain a couple of buckets of water out first so that the chemical is drawn in. See no. 28.
p.p.s you havw two boilers and two pumps? maybe the flow is going round incorrectly. I don't know why this might have happened.
yes, it should have done, so it sounds ike you have a flow problem. Maybe the flow is escaping through the other boiler. If the pump is working and the upstairs rads are closed the water must be going sonewhere. try feeling the hot pipes and follow them along to see where the heat is going.
I don't know how that would happen. possibly there is or should be an anti-backflow valve that has stuck. Or maybe there is a by-pass that is open.
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I have a oil heating system in a two story house, the rads in the upstairs are heating well, but the down stairs rads are only heating at the top and are cool at the bottom. I have replaced the pump, ( and drained the system ) but to no sucess, when the pump for the back boiler on the solid fuel fire is switched on with the oil boiler pump the rads down stairs heat up fine, but when switched of they cool down at the bottom again, this issue has just came up and is not the case since the heating system went in. Please help ???????
