[meg711]

Okay, please don't laugh. I've read the owner's manual and the Trane site a couple times now. It's totally gobbledygook to me. So here are my silly questions:

--The manual talks about upflow, upflow installed horizontally, and downflow. Our unit has the "grated" part on the bottom, which I think means that it's a downflow furnace. Anyone know whether that is right? Can someone please give me a simple explanation so I can understand what I have and which part of the manual applies?

--Assuming I have a downflow furnace, where exactly is the filter? Am I really going to have to call the local dealer to figure this out? (That's what the manual says.)

--Assuming I have an upflow furnace, which I doubt, I just can't find the two latches on the blower door where the filter supposedly it. (Sheesh--what's a blower door?) Can anyone help me find it?

--Do I really have to turn the power to the furnace off before changing the filter as the manual says? Do they mean at the electric panel? If I turn off the power and then turn it back on, will I have to do anything else to get the heater working? Will I need to light the furnace?

I do have an electronic air cleaner that sits on top of the furnace. And someone told me that that's the only filter I have. Could that be true?

I would really appreciate any help. As you can probably tell, I need a lot of help here. Thanks so much.

[hvac1000]

(((I do have an electronic air cleaner that sits on top of the furnace. And someone told me that that's the only filter I have. Could that be true?)))


Yes that is true. Sometimes there is a little metal mesh filter called a prefilter inside the electronic unit. It is very thin and used only to catch large pieces of dirt. Usually that is cleaned whenever the electronic air filter is cleaned.

[meg711]

What would happen if the electronic air cleaner has not been on while the heater and A/C have been running?

[meg711]

hvac1000,

Sorry about that. I hit the submit button without finishing my post.

Thanks for taking the time to answer my questions.

[hvac1000]

Yes the prefilter would still get dirty.

[tienle]

What is the filter model and where can I get the replacement (Trane XL80)