As the filter was replaced recently it could be just a loose filter housing that is causing the unit to "rattle" when it is running.
Rest your hand on different places near to the filter on the casing of the air conditioning unit to see if you can locate the cause of the new noise.
If the noise can easily be stopped just by pressing on the filter housing - or somewhere else on the casing near to it - then the person who changed the filter needs to come back and ensure that the new filter is correctly seated in its housing and that all the screws are properly tight.
the basement membrane
Possible solutions for radon mitigation: good ventilation of the house, ventilation under the basement, plastic filter under the basement, good finishing of the basement and walls, etc.
Filter installed in some vehicle to filter the air coming into the passenger compartment.
Could the odor be coming from the air vents?If so, changing the cabin filter might be helpful.See "Related Questions" below for more
pluged filter, dirty coils,
Does a 2007 Ford Explorer have a cabin filter? My SUV has a terrible odor that I can't seem to get rid of. Please advise. Thanks.
pollentube helps in germination
Perhaps It's Broken!
None because Fram is terrible. Use a Wix 57356, Purolator 14610 or NAPA filter that ends in 7356.
d manga which is coming now is a filter [u know what filter is right]
I live on a slab (no basement) my air filter is inserted at the very top of the furnace almost close to the ceiling so should the arrow on my air filter be pointing up to the ceiling or down to the engine of the furnace?
Sounds like a leak on the suction side of your equipment.