A good digital multimeter (DMM) is key to diagnosing compressor problems in general. For instance, in a previous article (May 15 issue of The NEWS) we discussed using the DMM to read suction and ...

The truck AC system depends on the compressor clutch to start the cooling cycle by engaging the compressor to circulate refrigerant. When you turn on the AC, an electrical signal energizes the clutch ...

Here is a question to ponder: What should the amperage draw be of a compressor in which the nameplate says the RLA (rated load amperage) is 59.6, but the compressor is only pulling 45 amps? Is there a ...

When my air conditioner stopped cooling properly in the middle of July, I didn't expect the culprit to be the compressor. I thought maybe it needed cleaning, or the thermostat was acting up. But once ...

From sweltering cabs to wandering steering, knowing how to troubleshoot your truck’s A/C and steering systems can save time, money, and stress. Modern heavy-duty trucks require the right tools, ...

Cooling systems don't fail randomly — they follow a pattern of gradual decline that's visible to anyone who knows what to ...