97 $420ec swich not off
If you can't turn off ec light by pushing the ec button you have a fault with your climate control system. Either you are low on freon or have a faulty sensor in the system.
If your EC light is on and will not turn off, it means you are probably low on refrigerant, R134a. The EC lights keeps the a/c compressor clutch off for 'economy' mode, helps save gas while your driving, but if you can not turn it off, its telling you the refrigerant is low and there maybe a leak.
It is on if you selected it by pushing the button.
You will need to push EC button and adjust the temp.
1. it could be the brake light switch they give trouble .replace it even if the brake lights work they have a 4 pin connector.the selector module need a brake pedal switch signal 2 let it out of park etc 2. I don't know what this person thinks the ec light is but if your talking about the ec light on the climate control, ec stands for economy, which turns off the compressor and stops giving you cold air, but uses less gas, thus being more ecomnomic to turn it off. the reason your light is stuck on is because your system is out of refrigerent which is causing the system to have low pressure and automatically shutsdown. you most likely have a leak. you could have the system recharged, and have them put die in the system then the mechanic can find the leak with a uv light. also the ec light needs to be turned off by a Mercedes mechanic because the compressor will not turn on and you will not be able to add refrigerent until the code is cleared.
You can try a few things. Make sure your tires are at about 34 PSI. If you turn off your AC, or run your climate control on "EC", that can help a little.
The EC button is for "economy" and when you press this button, it turns off the a/c compressor, to give you more economy or mpg while your driving
If you manuall put your fan speed to zero, it will turn the climate control to off. If you wish to have the air circulate with the A/C off then push the EC button for "economy". The compressor will be off but the fans will still circulate the air. Hope this helps. "G"
The air conditioner needs regassing
Yes, your a/c is not functioning if the EC light is on. This usually means that you have a leak in the a/c system, and low system pressure, which causing the system to turn off the a/c compressor and turn the EC light on, indicating there is a problem. Unless you are familiar with a/c systems, I would suggest taking to a repair shop, so they can leak trace the leak for you. Pressing it toggles it on and off. So if the EC (Economy - AC off) light is on, press it again to turn it off and AC will start working again.
Owgm/ec
If you can't turn the ec light off by using the button it means there is a problem with the a/c system (low refrigerant level). There was an issue with a setting (only a dealer can change) on some cars in the a/c control panel that causes the unit to think the refrigerant level is low. The dealer would check the refrigerant level and if it was ok, they would change the setting.