Hello- I was changing the filters in my mom's furnaces in her house. When I got under the crawlspace, the furnace filter cover says that the filter is a permanent type. There was no filter in it at all and I need to know what kind goes in it. It is a ruud model #RCBA 2457GG14 with a serial #...

What size filter does the armstrong air ultra 80 use?

No wiring diagram on panel door. Not having much luck retreiving one.

I just moved into a house and it has 2 electric heat pumps and 2 air movers - I guess that's what they are. I assumed they were backup furnaces, but I don't really understand after looking at the manual http://www.tappan.net/Literature/514b.pdf This is my first time having heat pumps in a house....

I have a Bryant heater/air conditioner combo that the heater has stopped working. Here is what happens when I turn it on manually- Smaller fan kicks on I can hear the gas come on for a few short seconds I can hear the igniter trying to ignite It seems like it is not igniting and after a...