You've settled into your favourite comfy chair ready for a binge-watch of your favourite show, but the room temperature suddenly feels like its rivalling the Sahara Desert's midday heat! With beads of sweat trickling down your forehead, you reach for the remote... nothing! The climate combatant, your dear old air conditioner, has laid down its arms and won't turn on!

Don't fret! Your friendly neighbourhood repairman has some tips and suggestions to help you solve this baffling mystery. Let's roll up our sleeves, grab those toolbox essentials and embark on the thrilling DIY adventure we shall title: "Why Won't My Air Conditioner Turn On?"

The Case of the Silent Circuit Breaker

Not all heroes wear capes. Some wear overalls and carry a voltage tester. The first spot to check is your circuit breaker. It could have tripped because of an overloaded circuit. This usually happens when too many appliances are sucking power from a single circuit.

Using your voltage tester, find the corresponding switch and see if it tripped (usually at 'off' or in middle position). Should it be tripped, turn it off first then back on. If this is your culprit, the AC should roar back to life. Remember, consistency is key here. If the circuit trips too often, you’ll need professional help for a more permanent solution.

The Tale of the Forgotten Switch

Sometimes, the solution is laughably simple. We're so used to remote controls that we forget the old-school switches. Look for an on/off switch on the indoor unit – usually near the bottom of the unit - and ensure it's turned on.

Then you have the outdoor unit's disconnect switch. It's likely mounted to your home's exterior near the outdoor unit. If it’s off, your warrior AC can’t fight the good fight. Turn it on and hope for a triumphant victory yell from your AC.

The Mystery of the Unresponsive Thermostat

Your thermostat acts like the brain of the AC. If the brain's not functioning, neither will the AC. Check the thermostat setting; it needs to be on 'cool' mode with the set temperature below your room temperature.

If that doesn't solve it, it might be time to change your batteries. The thermostat's digital display usually dims or blanks when the batteries near their end. If the mystery continues even after you've played detective, you might need a new thermostat or recalibration of the current one.

The Puzzle of the Clogged Air Filter

Your air conditioner's filter, much like the overworked coffee filter, tends to clog up over time. When clogged, your AC might freeze and stop working. The solution? A regular filter change. It's the daily cup of coffee for your mechanical beast. Now, filters usually last around three months, but AC's non-stop summer service might shorten this. So, if your AC's refusing to budge, check the filter, and replace it if necessary.

The Enigma of the Faulty Capacitor

The capacitor kick-starts the AC's various motors. If this electrical component fails, so does your AC. You'll need a multimeter to isolate this problem. Be wary though; messing with your AC's electrical system can be dangerous. Unless you're confident, this is a chapter best left to professional repairmen.

And The Mystery Continues...

Well, we've tried our best to answer "Why won't my air conditioner turn on?" through some commonly occurring scenarios. Remember, sometimes, an AC refusing to turn on could be a symptom of a more considerable issue. Predicaments such as refrigerant leaks, calibration issues or damaged motors would need the keen eye and expert touch of a professional repairman.

So, was your AC issue a case of the silent circuit breaker, the forgotten switch, the unresponsive thermostat, the clogged filter or the faulty capacitor? The plot might thicken, but you're now an equipped sidekick in your air conditioner detective series! Be patient and remember, every good mystery takes time to unravel. If all else fails, don't hesitate to call in your air conditioner superhero – an experienced repairman.

In the great adventure of life, may your biggest problem be a capricious air conditioner, and may you always find the strength and wisdom to discern between a DIY solution and dialling your trusty repairman. Until next time, happy problem-solving!