furnace noise

[sam]

I recently bought a 1989 schult and this is my first manufactured home. It has a "coleman" furnace and supposedly the previous homeowner did not maintain the entire house very well. but....anyway....I have the heat set on 65 degrees and its 5 degrees outside! I dont believe this is the most well insulated home, but i know it has the new codes and 6" walls.

The furnace (when running) sounds healthy, and the thermostat for sure is 5 degrees off. When the furnace cuts off it has a continuous sound like a "trickling" noise like somthing is always running. I think its the heat exchanger but i'm not sure. I asked some other people but they had newer homes and said the new colemans dont make any noises when they cut off.

DOES ANYONE KNOW IF THIS IS NORMAL FOR THE OLDER UNITS LIKE MINE????
I AM WORRIED and i dont want to be left without heat if there is something wrong and i need to prevent it.

A sincere thanks to those who can help me!!!!!!!

Sincerely,
Cold in the north!

[rmurray]

Sounds to me like you should have a professional furnace inspection and cleaning..Usually cost about $90..Can save on energy use though..

[David Petrick]

One great thing about manufactured housing is that ventilation requirements are strict. Your house has to vent .35 percent of its air each hour. With the age of your house, I believe the code applies, so the noise you hear may be a mechanical ventilation device. They are supposed to run when the pressure inside the house reaches certain limits, which the furnace coming on and heating the air would cause. Also, when you buy a new house, as I just did, you get all sorts of warnings about condensation, ventilation, and formaldehyde emissions. If you have asthma or breathing trouble, they advise you to purchase an additional ventilation system. So maybe your house has one. One way to tell is to go outside and figure out the chimneys. The one for the furnace is very tall, with a wider base (air intake) and a taller exhaust. I have one other one right near the chimney and if I open the furnace I can trace it to an air intake where fresh air enters the return air supply.

It could also be that the furnace is heating up ice on the roof and the trickling is water draining somewhere.