Why is the toyota yaris aircon not working?

You're driving Your Toyota Yaris on a cold winter day, when You suddenly notice the temperature in Your vehicle is dropping, and Your air conditioner is no longer working. What could be going on Loss of cool air could be caused by a handful of different things. First, You will need to check the undercarriage for a radiator leak. This could come from a cracked housing or hose. If the hose needs to be replaced, You will pay between $50 and $120 for parts alone. Alternatively, You could be experiencing an issue within the climate control module, or failure of the air conditioning compressor. If the module needs to be replaced, it will cost between $24 and $85 for parts. If the compressor has failed, it will cost $104 to $240 for a new one.