Microhood is not heating, otherwise functions normally

A microwave service tech will have to check your magnetron.

If this is an older oven, or an oven that has heated a lot of popcorn, or other low water content foods, then you might be looking at a magnetron that has become intermittent. The symptoms you describe, however, do not match the symptoms you usually see with this type of failure.

Based on your description of the problem, I'd investigate the possibility of an intermittent power relay. The contacts on these eventually burn and sometimes don't make a good connection. After the contacts first close, there're is an initial surge of current that might make the relay functional for a second or two, and then the damaged contacts no longer make contact.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

This is not usually a consumer repairable fault - but you may be able to clear it simply by unplugging from the outlet for a minute or two and plugging it back in again. Try it out and if it works, you're all set - otherwise it might need to be seen by a pro.

Good luck!

normally it should blow the units internal fuse first if its an internal issue, first check the line cord thoroughly for any bare wires at the case , then remove outer case asn see if cord is bare anywhere inside, then inspect unit fuse, take a multimeter and take a resistance check in an upper range og the meter of the disconnected h.v. diode, then disconnect h.v. capacitor(DISCHARGE) across terminals before touching and check this part, then lastly it could be the magnetron tube, or the hi voltage transformer, therse are VERY expensive items,you may vie to replace microwave then

If this is an over the range microwave that vents outside rather than recirculates the air back into the kitchen, make sure the magnetron cooling section of the blower was realigned to direst air downward over the magnetron. If the unit has a seperate internal cooling fan, make sure it is functioning. These checks need to be made by a qualified service technician only.
If it's a counter top unit, just make sure the internal cooling fan is functioning.

our tray that goes around and back and forth jumps the tracks and stops and turns the other way I can put it back on track before it makes a round it jumps the tracks again and starts going the other way is there a part that need replaced

This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.

Even though a door switch clicks, it may still be bad inside.

Door switches are most often damaged by opening the door while it's cooking (instead of pressing Stop / Clear first) or food
/ grease debris in the switch.

If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, linked here on Fixya: http://tinyurl.com/yzjozk

It's also possible there may be a problem on the circuit board, which we repair nationwide.

Sometimes they get heated up and bend up in the middle so they don't make good contact with the coupler. The way I fix this is to heat the support over a stove flame, then place a heavy weight on it so it holds the legs up in place a bit until it cools. Here it is step by step: 1. Apply heat at points where each legs meet the hub (stove flame) 2. Place end of each leg on an object so that the bottom of the hub is held up about 1/8" off the work surface. 3. Place heavy object on hub so the bottom touches the work surface. 4. Let it cool. 5. Test it. 6. If it still does not work, increase the height of objects in step two. See: http://207.234.249.73/mwd/turntable_support_fix.gif

"Microhood" seems to be a slang term for the "microwave hood" (hood fan or exhaust fan) which is normally part of an over-the-range microwave oven or range. But these should be available separately, as I seem to recall. I would contact home centers such as Lowe's, Home Depot (if they still exist), etc., or a local appliance store.