Does drip pan need to cover entire furnace or just coil. I got both answers for repair men.

Coil is separate from furnace. remove screws to door and use a coil cleaner in addition pour some bleach in the drain pan to keep water flowing to outside

Will any of these work?

http://www.repairclinic.com/Amana-Drip-Bowl-Drip-Pan-Parts

http://www.appliancepartspros.com/range-cooktop-oven-drip-pan.html

http://www.knobshopper.com/manufacturers/Amana-Replacement-Parts/cooktop_burner_drip_pans_bowls

There should be a chart pasted to the inside of the front access panel of the furnace. It will tell us what that particular blinking sequence means. Goodman isn't listing a gmp125-4 furnace so I need to assume it is a condensing gas furnace. I water has backed up into the draft inducing fan, the furnace will shut down. There is no reason for water dripping from the drain pan unless your A/C is running and the drain on the pan is plugged. Give me all the info. you can and exactly what is happening. Please look up the coded problem for me. I'll watch for your reply. I hope this is not too late to help.

The evaporation cooler tray can get build up of dust and debris and plug the drain..

Remove the cover in front of the coil, If the line set runs thru this cover try to slide it out of the way, some units have a triangle shaped sheet metal covering the end of the coil, if so remove.
The dirty side of the coil will be, on the air filter side of the coil, if the coil is very dirty use a vacuum with a with a brush and vacuum off the worst of the debris, some fins are soft so pay attention to them along the process. Using something like 409 and a pump up sprayer or squirt bottle spray the coil, start at the bottom and work your way up, this is so the water will drain into the drain pan.
When using the 409 and water watch that the water is not dripping into the furnace if so use a towel and or something to prevent the drips from getting into the furnace, take your time and be thorough.
Please buy a quality air filter, and prevent having to clean the coil again.

There is a drip pan bit the middle is open to allow air flow through the coil and into your ducting. If the drain for the drip pan is clogged it will fill up and overflow onto your furnace and then to the floor.If that is what is happening then clean out the drain tube running down the front of the furnace and it should empty the drip pan and solve your problem.

You also need to have your furnace checked for water damage in the electrical components, if these have gotten wet then you run the risk of a fire. Please consider calling an expert in your area to inspect your furnace and make sure the drain line is clear.

Have you checked your filters to make sure they are not dirty? Is the Insulated suction line starting to get
covered in ice? Is the indoore coil Iced up?

If yes, turn furnace off, try and change the filters,leave
unit off for awhile while it unthaws and try it a few hours later.

verymuch so it is clogged up , now open system treat drain pan with bleach ,blow out two lines if there are available but if theres only one treat that on ,then treat the coils clean an treat them after cleaning pour little bleach in the bottom of the pan

If the a-coil is on the suction side of the blower, the drain line needs to be trapped. take enough hose to make a circle below the drain fitting and then into the drain. The blower causes a suction up the drain line if it is not trapped and will not let the water go out the hose.

call a service guy