Question about Heating & Cooling
Your flue-less gas heater may simply need a a good interior cleaning and servicing. From what you described it sounds like the Oxygen Depletion Sensor (ODS) may be clogged with dust, lint etc. The ODS is part of the pilot assembly and constantly reads the oxygen level in the room, when the heater is in use.If the oxygen level drops to 25% the ODS shuts the unit OFF by closing the gas valve. This can occur if the ODS is dirty, because it's falsely reading the oxygen level.
One other thing that can mimic this problem is a faulty Thermocouple. With age, they wear out. It's also a safety feature that controls the gas flow to the pilot.
Everything I have mentioned is repairable. But, if you want to make it a DIY project, it will require some dismantling of the heater cabinet to access everything and replace parts. If the heater is as you say "pretty old", you may want to consider buying a new heater. Sometimes, it's just not worth the time and effort to repair an old heater.
Hope this helped you to troubleshoot and solve the problem.
Posted on May 27, 2011
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Posted on Jan 02, 2017
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