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Yes. That is the magnetron filament. There should be low resistance between the two terminals and open circuit from either terminal to ground. The entire anode structure (frame, heatsink fins, and magnets) is DC ground. That screw was not going to cause a short circuit. The high voltage is...

In operation the filament carries a few thousand volts relative to the anode (ground). With filament cold there should be infinite resistance. There is a short inside the magnetron. The round sensor is just a thermal switch to cut power in case of overheating it has nothing to do with the...

It looks like there is no speed control but there is a fuel cutoff valve. If the backfiring bothers you, shut it down by cutting the fuel and let it starve out.

Disconnect the battery while parked. If it still drains, the battery itself is bad. Or it's not getting charged up while running. To diagnose "battery drain" implies that you already checked that.

If the switch is on the transmission, the problem could also be that the shift cable / linkage is worn or out of adjustment, so moving the shifter to Park doesn't actually move the transmission (and switch) all the way to Park. As car problems go, this one is rather inexpensive to fix and also...

Years ago there was a Class S CDL which only allowed school buses. Now it requires a Class B with the P and S endorsements. As @Opelman noted that allows driving almost anything except a tractor trailer rig.

The compressor is cooled by the cool gas returning from the evaporator, so with a very low charge it can overheat. This also happens in car systems. The dirty condenser that you thought was clean was keeping the pressure up thus complicating the diagnosis.

Have you taken the top cover off yet to check the cooling fins? A mouse nest etc will cause overheating.

The one linked by the OP says "A19 replaceable LED bulb included." An A19 is a standard size screw-in household bulb. The bulb that comes with it is probably a lot like the tires that come with a new car; not particularly good. With a good design, integral LEDs can work better in terms of...

You can charge something get the 5% off then pay it off with cash literally on the spot. If you shop there at all it's worth having.

Many districts have placed a second adult on each bus facing backwards to police the little hellions. The driver can fully concentrate on moving safely through traffic. Of course this doubles the staffing needs.

Maybe the mix does achieve 89 octane though since the 90 E0 is the base for 93 E10. When it meets 10% alcohol it gets 3 more octane points. Mid-grade is often priced higher than mixing it yourself though, and overall it is just another thing offered to the market that almost no one should buy.

The AI doctors had 5 "colleagues" and unlimited books (including the JAMA articles with the test cases solved?) and only got 85%. It should have been 100%. It's like the chess AI computers that have analyzed every possible game (human vs. human as well as human vs. computer) in advance. I'm...

Part of the design is 50% glycol coolant. That is necessary to keep the boiling point up.

The same receiver is also used for the tire pressure sensors. TSB notes that a TPMS light and codes are likely if the receiver fails.

Just get a couple of used car tires. It is safe and legal to use car tires on a trailer, but not the other way around.

What are you saying there? The fans must run as needed for A/C operation regardless of coolant temperature. There are parallel paths of control. There is no way you get "ice cold" air with the car sitting still without the condenser fans running. That is just physics.

Yes if you start the engine cold on a hot day and set the A/C for maximum cold with the car sitting still, the fans should start almost immediately.

Mid grade is regular and premium mixed in the pump on the spot. Stations don't have a separate tank for it. It sounds like this station only has two tanks underground, so they can't also offer the typical E10 93 that most people know as premium.

If the PIN was actually used (and money was actually charged-- this whole thing could be a scam from start to finish), it's under different rules than the usual VISA / MC dispute. The customer must dispute to the bank in writing. A bank customer is always somewhat protected from any...