Originally Posted by NJ Gimo
We have a small place that is heated by a vented propane furnace. When the furnace comes on, it makes a clanking noise, and the same thing when it goes off, enough to wake you up at night. Is this the cold air contacting the combustion chamber, or just the metal expanding and contracting ?
Any ideas on what might be causing this ?
Honestly we can guess about all day and night, its not going to make the noise go away and you will still be getting woken up. Since the unit is fired on propane, and propane can be very volitile, I would have the unit service by a pro,and consult with him about the noise while he is servicing the unit.