Radiator failures are frustrating and one of the things that frustrates people the most is that they can come on for no apparent reason.

What is an oxygen sensor? Welcome to Mercie J auto care, where compassion and craftsmanship come together. I'm Rick Smith, master certified technician. Well an oxygen sensor or an O2 sensor, basically what it does is it screws into the exhaust.

What is a catalytic converter?

One of our viewers asked, how do you test an expansion valve?

The question of the day is "How can I tell if my condenser is plugged?

How to tell if an AC compressor is working. Welcome to Mercie J Auto Care, where compassion and craftsmanship come together. I'm Rick Smith, master certified technician. So first of all, I’m going to cover two things on this. Question one is how do you know if it’s engaging and secondly, how do you know if it’s working?