Tag Archives: #truck HVAC

Truck heater control valves


By Chris Tyson, MACS heavy duty contributor We have several Class 8 trucks in our fleet and when temperatures begin to drop outside many of their owners visit our shop for heater-related repairs. That’s exactly what happened when the operator … Continue reading

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A fleet for field work: servicing specialty equipment


By Stephen Petit, Siefkes/Petit Communications In heavy-duty A/C work, the service vehicle is essentially a shop on wheels — it’s vital for reaching equipment that operates virtually around the clock or can never see the highway. NVB Equipment in Fresno, … Continue reading

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Change is coming to heavy duty refrigerants


By Steve Schaeber, MACS manager of service training Last year around this time the US Environmental Protection Agency (EPA) finalized Rule # 20, which was a Change of Status Rule affecting several industrial sectors including MVAC (Motor Vehicle Air Conditioning). … Continue reading

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Do you know how to handle A/C for off highway vehicles?


  Like the light duty world, most heavy duty HVAC systems are tested using a laptop and specific software. However, the Freightliner M2 Business Class Truck HVAC controls and blower motor circuits can still be checked using common items found … Continue reading

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Got trucks? get A/C training!


Are you among the best of the best of heavy duty and off-road technicians? RSVP now for top shelf heavy duty A/C training and plant tour at RED DOT in Seattle, Saturday September 20th! MACS members and those who should … Continue reading

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