I just replaced my condenser fan in my truck.the a/c was not working at all.I have checked all the fuses and relays and they all are good.I can take power to the compressor snd the fan and they will come on a blow cold air.the light on the a/c controls that turns the a/c on or off stays lit up never turns off could the controls be my problem?

I just replaced my condensor fan in my truck.the a/c was not working at all.i have checked all the fuses and relays and they all are good.i can take power to the compressor snd the fan and they will come on a blow cold air.the light on the a/c controls that turns the a/c on or off stays lit up never turns off could the controls be my problem?

Was the A/C not working before you replaced the condenser fan?
Was the fan replaced to try fixing the A/C?
Do you know if the system is fully charged?

Was the A/C not working before you replaced the condensor fan?
Was the fan replaced to try fixing the A/C?
Do you know if the system is fully charged?
No it was not working when I bought the truck.the fan motor was bad so I replaced it and the system is fully charged

If the system is fully charged, you'll need a way to fault-trace it electrically.
Do you have access to any service manuals for your truck yet? Particularly the electrical diagrams or schematics and a quality DVOM will be needed, also.

Turn the A/C on. If the compressor runs and the receiver/dryer, for instance, chills down, the blend door actuator may be the problem. If you have Electronic Air Temperature Controls (EATC), run the diagnostics on the system. See if any codes come up. If only "soft" codes are recorded, clear them; afterwards, start the truck and try the A/C again.

If the compressor runs and the receiver/dryer doesn't cool down, attach a manifold gauge set and check the static pressure. Afterwards, check the high and low pressures, when the engine is running. That should give you a good idea of where things stand and what steps, if any, should be taken.