Among other problems with our geothermal heating system, I noticed the other day that there is standing water in the condensate catch pan under the coils. Almost a half inch. This may explain the musty smell that I've noticed coming from the air registers when the unit is running (both heat and a/c). I took the pvc drain pipe off and cleaned a bunch of crud out but, the water still didn't drain out of the pan... even with the drain pipe "off". Yes, the drain hole was open, the pan was full, and the water didn't come rushing out like I thought it would. So, I put a bubble level on the pan and saw that it is perfectly level. WTH? Isn't the condensate catch pan supposed to be slightly tilted toward the drain hole ?? I have neither the tools nor the knowledge of how to fix this so, I guess I'll have to put in a call to the contractor. Just wanted to double check here first that the catch pan should be mostly dry, correct?