Central Air Novice---questions within
1st off, my basement unit stopped blowing cold air last night. Having some experience with a window unit I checked the filter. Filter was clogged and the Condenser(?) was iced up on both sides and not allowing air to flow through, probably caused by the dirty filter right? Size is 16"X20"X1". What is a good filter replacement? This looked like it was constructed of a weaved fiberglass. I know here at work we have a pleated(?) filter.
Also, I noticed that cool air was leaking out small little holes in and around the unit....should those be sealed up with tape?
The upstairs unit is in the attick. I checked the filter there and it looked clean but the size is 16"X25"X1" and it was crushed to fit. I measured the opening and the 16" wide was more like 15" 13/16's of an inch. Should this be rounded down to say a 15.75" Filter?
Sorry for the newb questions but this is my first experience with Central Air systems.
A dirty filter can definitely cause problems. When's the last time it was changed? A blue fiberglass or standard pleated filter (rounded pleats that aren't as restrictive as the 3M-type pleats). Let the system thaw out (the fan can help) and then change the filter. If it continues to freeze up, it's time to call for service as something else is causing the icing.
Leaks should be sealed as much as possible. A tiny leak here or there isn't the end of the world. Many indoor units do leak out small amounts of air at some places. If the leaks are on the ductwork, you can use foil tape.
As for the upstairs unit, it might be meant for a 15x25x1 filter (may be more difficult to find, hence the 16x25x1 being slammed in ).
Ryan, thanks for the respons. Yea, they are just small holes/gaps in the sheet metal of the unit.
No idea when it was last changed. We moved into the house in April and it was there. There is only one filter in the basement. In the attick there are three but the on in the unit was crushed to fit and the other two replacements certainly were not the correct size for the unit.
So a Blue or pleated are best? I did shut off the unit to let it thaw overnight. I plan on stopping off to day on my way home to get some filters. I'm thinking I go a tad smaller than the filters currently installed.
There are pleated filters that aren't that restrictive
Beenthere told me that if the pleats have a sharp angle from the apex to the bottom of the pleat, its too restrictive. I'd look at Lowe's, HD for filters. Also, one of the guys on here suggested looking into Nordic Air (12 MERV) very good. Mine fills up fast so its imperative to change it every month.
Originally Posted by mrgto
I'll put up w/a bit of restrictiveness, to keep crap off the blower wheel and coils and from blowing back into the house. That's just me.
You want the right size filter. So if the downstairs is right, then I wouldn't go any smaller. Some pleated filters can be restrictive. If you get a pleated filter, don't get the 3M kind. Look for the pleated filters that have more round pleats. Probably better off going with the blue spun fiberglass filters and changing them monthly.
I use standard pleated filters from Flanders. They work well--MERV 8.
Stay away from the 3m filterette pleated filters as these will cause you problems.
Filters come in standard sizes. A 15.75" filter would need to be special made. A 16" filter will measure less than 16" so it is supposed to fit. Maby the filter cabinet is made wrong.
Its a good Life!
OK, I bought the cheap blue fiberglass filters. Changed out the very dirty one.
Turned the AC on, stat said 81 in the house. Now before the ice over, when the AC was on, the rooms would cool right down. Last night after 2hrs the temp had only dropped to 78 from 81...it was COOL air and flowing well but not COLD AIR like previously.
Give the system time to cool the home down. When it has a high heat load, 3 degrees in 2 hours does not sound unreasonable. Can you take the temperature of the air coming out of the registers?