Instability of inside temperature

nothing to do with the ac charge
the fan not running is a problem so check out the relays , fuses and temperature sensors that control that fan

No. . The temperature you set controls the module. When the inside sensor sees that temperature the fan speed slows and the blend door responds to that temperature.

may be a factory setting do u use all of the controls on the panel for air, etc?

Hey Brian ,
ICP - Integrated control panel
RCC - Remote Climate Control Module
Integrated Control Panel-Electronic Automatic Temperature Control
Control Assembly The Taurus, Sable vehicles group together the following systems into a single integrated control panel:

• AM/FM stereo radio
• clock
• rear window defroster switch
• electronic automatic temperature control (EATC)
• full-logic cassette tape player
• compact disc player control (optional)

The remote climate control module is mounted to the A/C evaporator housing behind the integrated control panel. The integrated control panel is connected to the remote climate control module with a dedicated two-wire communication link. The integrated control panel EATC features:

• a vacuum fluorescent display (VFD) for displaying set temperature, ambient temperature, function and diagnostic trouble codes (DTCs).
• electro-luminescent backlighting for all buttons and graphics.
• function override buttons.
• temperature control and blower speed rocker switches.

climate control is control by a controller or computer which read inside car temperature sensor and ambient sensor.best have vechicle check at garage you need diagnostic equipment to trouble shoot climate control.many things cause climate control problems. could have faulty temperature blend door actuator or bad sensor.

That is two separate problems. The "Flickering" of the outside temperature thermometer might be normal to some extent. Sometimes, the voltage from the sensor is at a point where it could be say, 31 degrees F or 32 degrees F. The display may flicker back and forth between 31 and 32 very rapidly until the voltage changes just enough to go make it go solid one way or the other. It probably does this all the time, but you didn't notice until you were paying attention to the temperature problems inside the car. (One actually has absolutely nothing to do with the other.)

The cracking and popping noises you are hearing from the temperature door and the difference between the temperature on the driver's side and the passenger side are the same problem. Apparently, you have dual zone climate control. This is usually caused by one of the temperature doors sticking and either stripping the gears inside the door control actuator or breaking the door itself. If you have both sides set at "HOT", the side that is cold is your problem-child. This will usually also set a fault code in your climate control module and may make your climate control display flash. (but it doesn't always flash when there is a code present)

What does mean econo light in toyota corona premio 2000?

the sensor is in the dash i found mine whilereplaceing the heater core you got to take it all apart

Hello,
I suggest checking the fuses. If the fuses are ok it may have a bad module or switch unit.
I hope this helps.
Roy

You might want to check to see if your heater core, which is located under the dash and inside the car, is not leaking. Look to see if you have a wet rug on the passenger side. If it is not leaking then try turning you vent knob to outside air and not recirculating.