When testing a 110 circuit my fluke will only read 43 AC every single time! What's the deal?

Check the internal fuse - usually there for amperage readings.

There is an issue with your Dc measurements board. Contact [email protected]

something damaged in input circuit

input protection circuit is blown , see if you can find fusible resistor and check for open circuit (should be 1kOhm) - big resistor on the right straight from the Volts input

1. make sure that all buttons can be pressed freely (not stuck)
2. make sure when measuring AC current that you press AC button and AC sigh is on LCD
3. make sure that jaws are closed completely
4. clamp meters use Hall effect and can only measure current flowing through ONE conductor (you cannot measure current around power cord (which has 2-3 or more conductors)
5. when in DC setting and you turn zero knob does value changes (it should)

Not sure what you are testing but if it is current, T5-600 is rated to 100A AC.

It will be repaired at a Fluke repair facility. They are not easily repaired by do it your selfers

i dont know if this affects the reading on AC but in the back of the meter there are 2 fuses. remove the back cover and check these fuses.

The fuse is a 110 volt breaker in your service panel. If your heat comes from the heat strip it is inside of the ac in front of the evaporator. If it is a heat pump thats the the compressor. To create heat the compressor runs in reverse. There is a directional relay operated by the circuit board and thermostat to tell the ac what you are calling for, heat or ac. The heat strip is connected to the circuit board and is also operated on 110 volts. You have one of three problems. Breaker tripped, bad heat strip, bad circuit board. Possibilities, find the heat strip cable and unplug and plug it back in a few times,maybe lost connection. That happens at times because of the warm and cold elimates. The heat strip can be tested by takeing it out and bench testing it with 110 power. circuit board can be checked by use of a volt meter, turn the ac to heat and check the pins where the heat strip plugs in. To chech the heat pump you must go up top, remove ac cover and with an amp clamp find the wires going to the compressor and put the amp clamp on one wire only. Amps should be no more than 7 amps. If it is the compressor is shot. If there is no reading then the compressor is not running. Now you may have a bad capacitor which is up top under a sheet metal cover. They also can be tested with a VOM. You will find 2 or 3 capacitors depending on model. Run and start. Capacitors typically are charged with 370 to 600 Volts. They will knock off the top of your camper. BE AWARE OF THE FACT YOU ARE DEALING WITH 110 VOLTS. IF YOU ARE NOT FAMILIAR OR COMFORTABLE GET SOME QUALIFIED HELP. GOOD LUCK