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Posted by Colin Brodsky on January 06, 2004 at 17:01:47:
Our heater is not turning on the circulator when demanded by the thermostat. I have traced the problem to the Honeywell L8124C Aquastat relay. There is a silver spring-loaded rocker which when I pull it back, engages the relay to start the circulator, and shortly thereafter, starts the oil burner. In this situation, it is working normally. The zone valves are all being held open by the thermostats as they normally are when heat is demanded.
I noticed yesterday when I got home the heat hadn't recovered, but when I played with this switch, it started to run, and was able to do so on its own well enough through last night and this morning. However, it was clicking on and off rapidly a lot. Today, it doesn't seem to do anything unless I move it myself.
Is this a problem seen by others, and what is the fix? Contact problem somewhere?
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