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Vehicle Components

Compressors 101

May 2, 2022

You are invited to attend a compressors 101 class I will be conducting next week at the MACS training facility in Lansdale, PA.  The title of the class is Behavioral Characteristics of Various Compressor Types.  It is happening live on Wednesday May 11 from 5:30 to 9:00pm
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Tools and Diagnostic Equipment for Mobile A/C Service

April 29, 2022

Remember it is up to the individual service company or technician to ensure they are following the requirements established in the location where they are working.
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Vacuum pump maintenance

April 26, 2022

As mentioned in last week's blog post, vacuum pumps require regular maintenance and frequent oil changes and  We wanted to provide information on the intervals, so we polled several vacuum suppliers.
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Your A/C season supply list

April 20, 2022

Unfortunately, something that is often absent from these A/C shopping lists is vacuum pump oil, and multiple containers of it should be included.
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The desiccant myth

April 12, 2022

There is a myth that exists involving A/C service work and driers that seems to come up from time to time.  I have encountered it when handling tech calls and have seen it come up in A/C forums. Read more to find out what it is.
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No drier replacement, no compressor warranty!

April 6, 2022

Compressor manufacturers and parts distributors are adamant about driers being replaced when one of their compressors are installed. No drier replacement, no compressor warranty! 
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What is a receiver drier?

March 29, 2022

With A/C season just around the corner, this seems like a good time to provide some updated information on these units.  NOTE:  Receiver driers are sometimes called filter driers and accumulators are sometimes called accumulator driers.
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Heat pump basics

March 2, 2022

An internal combustion engine (ICE) is relatively inefficient, using only about a third of the fuel's heat energy (BTUs). The rest of the heat energy is “wasted” in friction, cooling and exhaust heat losses. Yet, the ICE’s wastefulness benefits the vehicle's interior heating.
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The benefits of MAP-controlled thermostats

February 9, 2022

A customer driving a 2014 BMW 328i arrived at the college's 2nd-year electrical lab reporting his illuminated check engine light. The customer had no complaints other than the light. The vehicle had just over 82K miles showing on the odometer. A student (Phil) assigned to the BMW performed a review with a scan tool, and a single code (P0597 – Thermostat Heater Control Circuit Open) was present.
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Sometimes it is user error

February 8, 2022

I encountered a situation in the early days of recovery/recycling machines when they had just been introduced.  I had set up a machine about four months earlier when the customer purchased it.  I went to great lengths to cover proper operation of the unit and the shop owner even attended a certification clinic I conducted. 
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