Question about Ducane 30400042 (LP)

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Installed June 12, 2012 a new Ducane Bottle Gas Furnace. My furnace will run a normal cycle of around 10 to 15 minutes. Then 3 min later it will start again and run for 3 to4 minutes and shut down or

Furnace is running nornal this last hour.

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1 do you have a program or mercury buld mercury bulb.is usally a adjustable heat anticipator which a digital is fixed I recommend a digital t stat but also be advised that mercury bulb tstat are really phased out you could also have a issue with your main limit inbetween the heat exchanger wheather it is a cam stat or a normally closed limit but being a new furnace its more likely to be a n/closed limit will open if there is to much heat in supply box above the evap coil.you would need to take your delta temp reading within manufacture specs..or call aca or your local hvac company 770 932 8990 ask for mr.blaine to schedule your appointment today or are office staff thanx.

Posted on Jan 24, 2013

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SOURCE: Ducane high efficiency propane furnace, pressure switch problem

A short cycle heat cycle indicat a pressure switch replacement was needed. This did not fix the problem. the problem was in PCV line since the end was filled with slugs and cause the line to backup with water. When this happen the system would stop asking for gas. the water would leak out and it would restart. The problem was fixed by cleaning value at end of PCV. This released the water, two quart of water, that was back up causing problem. Curious if a filter change indicator was providing a clue that was missed?

Posted on Feb 24, 2009

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