Why doesn't increasing or decreasing resistance buttons change actual resistance on machine?

No make or model of vehicle as sorry, cannot comment.
Don't use it until it is fixed, possibly a wiring error on the steering wheel.

F05 - NTC failure (SC/OC)
All appliances managed by the electronics measure the temperature using a thermistors. These thermistors changes resistance depending on the temperature. There are two kinds of thermistors, NTC and PTC.
NTC has a negative temperature coefficient which means that with increasing temperature the resistance decreasing (used in washing machine, dishwasher, dryer, refrigerator....etc).
PTC has a positive temperature coefficient which means that with increasing temperature the resistance increasing (used in oven, refrigerator for starting compressor...etc).
If you look in the table below, it is clear that the resistance value of 100 ohm means that is NTC faulty. So, I really do not understand how it is possible that the resistance increases with temperature?

Resistance of NTC depending on temperature
0 °C 35.9 kohm
30 °C 9.8 kohm
40 °C 6.6 kohm
50 °C 4.6 kohm
60 °C 3.2 kohm
70 °C 2.3 kohm
95 °C 1.1 kohm

Dado

If the display stays at 1, then the UP button may be at fault, in which case you would need a new keypad.

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It sounds like the motor is burned out or the connections form the switch, or to the motor are bad. You'll need to troubleshoot with a voltage meter.

adjust the magnet, tigh the bolts with some wrench. test the magnet with the magnet from refrigerator for to see if is attracted or repeled , change it if necessary.

sincerely. God bless you

your mobile need repairing
increase button is stuck it needs to be released

connections under the car leading to the fuel sender unit.
test gauge with multimeter for continiuity
take tank off and inspect fuel sender unit for signs of physical damage around the copper coil and test with multimeter for resistance by moving float up and down and resistance should increase one way and decrease the other way

You may have a bad connectors to the Throttle position sensor. A TPS is actually a varistor, or same thing as a variable resistor. It is like the volume control on old stereos that do not have digital volume control. The computer determine throttle angle by input current which varies with the resistance. Make sure the connectors are good before you change it otherwise a new one will not solve the problem. I know how to check a TPS, but it is hard to explain how to do it, but I will try anyways. The TPS has 3 terminals. The resistance should vary as you turn the TPS. In respect to the middle terminal one side will increase, and the other side will decrease in resistance value. Sometimes it is not the center terminal that is the common point. so either way out of three you one that is common to both which should vary in resistanced in oposite ways, one side decreases, and the other increases as it is turned. A short course in electronics. As elctricity flows trough a resistance its current decrease as the resistance increase. The resistance value on a TPS should be around a few thousand OHMS, and the lowest value is around 500 OHMS.

There is a wire that Breaks that is attached to a limit switch that is located inside the elbow of the Pivot arm. If looking from the Back of the Machine, it is on the RIGHT side. I extended the wire an rerouted it to run on the outside of the pivot arm to avoid be nicked or pinced by the moving parts.

on the front of the monitor there are key buttons naming menu, ok button and left & right arrow marks buttons first press menu button then go to brightness then by using arrow keys you can increase & decrease the brightness once you are finished decreasing r increasing press ok button.& there are many other settings you can change like contrast etc....