WRYF300

The fan is noisy on the KG1000G.

Is this a new noise or has the radio always done this? I use the 1000G as a base and the fan comes on whenever I key up and the speed varies. Is it just the fan noise that you are worried about or does the sound seem to come through the speaker? Probably just the sound of the motor.

It could be the internal fan or it could be a number of things that are causing interference. First check for any wall wart power supplies, they are notorious for being noisy. Also check other power cables and even computer cables. Keep all of them from touching your coax cable if possible.

The fan maybe?

Transmitting with one radio and listeniing with another radio right next to the transmitting radio is not a reliable way to determine that you're not transmitting.  The listening radio may desense and become deaf because of the proximity of the transmitting radio.

So, general stuff first. Think of tones as a filter, that only lets signals through that carry a matching tone. These are ctcss (also called PL by Motorola, or QT by kenwood) and DCS (aka DPL or DQT). Repeaters will usually have it enabled on the input (what you transmit to).
Getting a hair more specific..Midland radios commonly need the repeater channels to be enabled in the menu; with that out of the way you'll see 1-22 (skipping 8-14, most likely ) and then find 15r-22r, which are set with the proper offset for repeater use. As far as tones, you want to be on the appropriate channel for the frequency of the repeater, (page 26 of the instructions has what channel is what frequency), then set the transmit tone; use the table on page 27 to see what tone exuals what code, and page 19 has the instructions on how to set the tones.
 
Looks like DPL 047 would be code 7 under dcs.
https://cdn.accentuate.io/81031332017/1623709961570/MXT115-Owners-Manual-11-16-2020.pdf