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Posted by HeatPro on February 17, 2006 at 23:54:29:
In Reply to: thermostat problem or .............? posted by Peter on February 17, 2006 at 23:41:40:
"a zone valve and the placement of the thermo. ... when it calls for heat, it stays on for only averaging 1 min or less before it quits. "
A zone valve is not enough information. Some zone valves can affect the thermostat differently than others, so manufacturers give them a manufacturer's name and a model number.
IT is not specific enough. What is IT that stays on for 1 minute.
Answers to specific machines come when identification is chrystal clear.
http://www.heatpro.us/service/yeahbut.htm