:confused: I'm not that handy but I'm learning. I have a five year old house I just bought and I don't know where is the furnace filter. My furnace is laying on its right side so any info will be great. Is it inside or on the bottom? The model is 58STA-58STX Carrier furnace. :confused:

Here's a link to the owner manual for that model:
http://www.xpedio.carrier.com/idc/groups/public/documents/techlit/om58-107.pdf
Pages 6-7 cover replacing the filter.

And here's some other liturature for it for your future reference:
http://www.commercial.carrier.com/commercial/hvac/product_technical_literature/1,3069,CLI1_DIV12_ETI4906_MID157_PRD750,00.html

RickJ,

Can you help for the link to the manual of my Day & Night natural gas based furnace, model #: 80U-19A, please! Thanks.