Thanks for the reply's guys. Carl after your post I took the hose out and tried to clean the coils a bit. I then let it run another 6 hrs , but still no temp change.
I had already cleaned the filter and the water flow is good and strong. I live in St. Petersburg florida so daytime temps are around 84 deg and night time temps are around 74 deg. The heater ran for 15hrs straight than I turned off cleaned the filter and ran it another 13 hrs with no change. I have heated the pool many times before and after 15 hrs, even in winter, the temp would be well over 80 deg.
The unit is a TropiCal T-115B-A
BTU/KW 94000/27.55
I do not have a cover but plan to get one soon so any advice on that matter would also be much appreciated.