I have carrier 9200 weather maker, which is 9 years old but every year it has problem in Spring and Winter. The latest code is "LED Light ON" meaning "on 24VAC power" (don't know what that means). Please help me if you know what it is and save me from exponential charges (which I keep paying every vist).
When you turn the fan to on at the t-stat does it come on?
try the A/C, does the indoor blower come on?
In A/C mode does your compressor or fan try to come on?
Also check to see if the cond. pump is working"if you have to pour some water in it to see if it runs"