Tag Archives: automatic temperature control

Successful training day in Macon, Ga


MACS training clinics are now in full swing! A great mobile A/C training day was held Saturday, March 19 at Global Product Distributors in Macon , GA! Here are some photos! MACS Trainer Larry Turay and Julian Hentze Global Parts … Continue reading

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DENSO website how-to at the MACS 2016 Training Event


Attend MACS 2016 Training Event and Trade Show, February 11-13, 2016 at the Caribe Royale all-suite hotel and convention center in Orlando, FL and you’ll be able to take part in training classes like this: DENSO’s New HVAC for Motor … Continue reading

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Fiat now using R-1234yf in U.S. vehicles


By Steve Schaeber, MACS Technical Editor It’s been reported by MACS that during 2014, Chrysler Group LLC was the largest car line to use the new refrigerant R-1234yf here in the US market, as it begins the changeover of its … Continue reading

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Hot advice for heater diagnosis


When a cold winter, produces a lot of no-heat complaints. And with the struggling economy, the word we hear from most shops is that customers are not willing to spend for extras. So what’s a conscientious shop looking to pay … Continue reading

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That relay really stinks!


By Steve Schaeber, MACS Technical Editor Here’s a situation where your nose can be the best tool in your box. A fellow technician was diagnosing a “high hi-side” issue on a Pontiac Sunfire, when he asked me for some advice. … Continue reading

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One of those A/C things


One of the problems every shop faces – because customers don’t realize what’s normal and what isn’t – is how a system works. When the 2001 model year small GM SUVs were introduced (Chevy Blazer S-10, GMC Jimmy and Olds … Continue reading

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Better check the heater


Happy Fall! By Steve Schaeber, MACS Technical Editor It’s one of those cold mornings, (like the ones we’re starting to get here in the Philadelphia area), and maybe you go out to your car and find there’s no heat blowing … Continue reading

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8 tips for A/C system preventive maintenance


1. Clean the front of the condenser.  The debris that builds up between the fins can really raise the head pressures, and that not only affects performance but can cause slipping of a clutch if voltage is marginal. If a … Continue reading

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4 tips on the relation of humidity to mobile A/C operation


Humidity should be a major consideration in  A/C performance tests. When humidity is very high, the A/C system expends most of its effort wringing the moisture out of the air. That’s the way it should be as we’re more comfortable … Continue reading

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Compressor Command Decisions


by Jacques Gordon When you’re trying to find out why an electrical device doesn’t work when the switch is turned on, do you start at the device itself and trace the circuit backwards through the system till you get to … Continue reading

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