My A/C works fine and is fully charged so I don't want to discharge it but I'm sure my evaporator could use a cleaning after 23 years of service.

Can it be accessed in place by removing something (like the blower fan)? I have some foaming coil cleaner to use. 1992 Accord EX. Thanks

 

It looks like you could access it via the opening of the blower, but you would be working blind. The avaporator core is made out of aluminum with fins so don't try to poke it too hard. Perhaps, a flexible vacuum hose (if you could manage to get it inside ) would be ideal to retrieve loose debris. Be mindful that there is a drain hose at the bottom of that assembly so you wouldn't want to knock the debris loose and left them inside.




Here is a picture of it.

 

You have to remove it to do any meaningful cleaning of it. It's not really as hard as you think it is to remove it.

 

He can't remove it unless he is willing to open up his AC system.
It requires some labor, and I don't see people are willing to open up their A/C system while it is working fine.


Cleaning out his evaporator would definitely improve the A/C efficiency though.

 

In most cases it will be "dry" debris and that is easily cleaned out through the blower fan opening, as mentioned a vacuum with flexible hose will make the job even easier.

However if it is wet debris and it is clogging the drain hole then you will need to do a recovery and remove the evaporator to properly clean out the evaporator and the housing.

Dry debris tends to stay on the blower side of evaporator, if it gets wet it goes everywhere including into the evaporator "fins" clogging it up. 94

 

I ended up removing the glovebox and drilling a 0.5" hole in the plastic housing in front of the evaporator, between the blower and evaporator. This is enough to spray in some citrus cleaner or foaming HVAC coil cleaner and get pretty good coverage. A thick piece of foil tape sealed the hole back up. It won't clean as well as removing the evaporator but i'm sure its better than nothing.

 

Thanks for the updates!
While the fresh smell may make you feel fresher and better (mentally), I can assure you that it did absolutely nothing for your evaporator. Instead of drilling a 0.5" hole, you could have easily unscrew 3-4 nuts/bolts and drop out the blower which could have given access to your whole arm.
I could not find a clip for your Accord. The clip below is for a Civic, but it should be pretty similar to yours.

 

I can't remember where I read it but I think getting the blower out of our Accords is a pretty big pain. Anyway, why do you think this method of cleaning is useless? It won't get rid of dry debris but it should get rid of dirt/grime in the evaporator fins.