liquid line filter drier

[ksbj83]

Do All Hvac systems need a liquid line filter drier?

[Milk man]

Yes.

[amickracing]

They don't need one to run... so to speak. But it will help it run longer by keeping the moisture and trash from getting where it shouldn't.

Keep in mind a lot of units now come with a filter/drier inside the unit, so you may not see one on the outside.

[NormChris]

Every HVAC system should have a filter-drier installed. Not an essential component in so far as a filter-drier is not necessary to the cooling cycle but the filter-drier will help protect the system.

For more information on the need for a filter-drier see my article at this link.

http://www.bacharach-training.com/norm/desiccants.htm

I would never install a system without one. And, I would always replace it each time I opened the system for service.

[markwolf]

None of them "need" one but all of them should have one.

[mjk_na]

Require filter dryer, especially for hermetically sealed air conditioners. Example is a window air conditioner.

However, the installation has to be controlled, without any moisture ingress. Servicing is normally not possible at the client's place.