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AC not working, is there a DOT regulation about this?

Discussion in 'Experienced Truckers' Advice' started by ewill71, Jun 13, 2012.

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skateboardman Road Train Member

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snowwy said: ↑

Air blowing on the windshield is what defrosts. Warmer air works faster then colder air. Heat is what defrost the ice buildup. I get the same temps out the top that i do out the middle and the bottom. If it's warm enough. I don't turn the temp up to clear the window. I just turn the air to the windshield. Unless it's ice to i use the heater. And it's usually back on vents before operating temps are reached. I also only use the defroster to clear my viewable area. Let teh vent hear do the rest. I don't use it on a full time basis to run the risk of cracking. Unless it's snowing. And i do like others have suggest in previous posts. Pull the windshield down to trap the heat to the window. And cracking don't usually happen unless you've already got a crack to begin with. Or you're on bumpy dirt roads and what not to shake the windshield around.

The compressor is tied in to the system so that it gets used in the winter time. TO PREVENT SEALS FROM DRYING OUT AND COMPRESSORS FROM FREEZING UP during winter time NON use. I'm sure there are other factors too. And i don't doubt that some vehicles might blend cold and hot. Not all manufactures work the same. And some of that might be taught in school. But the main teaching in school that i remember. Is to keep the compressor from going bad.

In utah. And i'm sure other states have teh same problems. Moisture overnight simply causes wet frost on teh windshield. Wipers do teh job. To a point, then defroster is needed. I use the ice melt washer fluid during that time of the year. January is the hardest month. You actually need to scrape the ice off.

The other time we need defrost. Is the water we track in our cars making the floors wet. ( rain, snow) Even a detail and wash inside
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Yeah turn the heat to it in rainy weather and watch that windshield up on the inside. And would have thought the defroster works by blowing air on the windshild

skateboardman, Aug 10, 2016

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Pedigreed Bulldog Road Train Member

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skateboardman said: ↑

How did us old guys survive before Ac was common??????
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Hell, I don't consider myself "old", but we didn't have A/C in the house I grew up in. Wasn't until we moved summer before middle school that we had that "luxury".

bossboy2 said: ↑

In today's trucks, the defroster works via the a/c system so yes, the a/c must work. Also, you've heard the ultimate D.O.T. goto rule, if it's on the truck, it MUST work.
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No such rule exists. REQUIRED equipment must work. Extra stuff NOT required does NOT have to work. Even with your lights. You can have 1,000,000 chicken lights on your truck and 3/4 of them can be burned out...but as long as the REQUIRED handful of lights are working, there ain't a darn thing the DOT can do about the 750,000 burned out auxiliary lights.

alghazi said: ↑

Absolutely amazing that this many drivers would dispute that a driver should have AC in his truck.

If anyone ever wonders why drivers consistently get the shaft, look no further than this thread. The contrarian misfit nature of some drivers won't even allow them to stand together and agree that AC is a necessary feature for driver comfort and welfare.

Pathetic.
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AC didn't work when I bought my truck. You know what I did? I pulled the compressor, condenser, dryer, lines, brackets, and everything else AC related out and pitched it. Dropped 40 pounds off my tare weight. That was 800,000 miles ago, and I've been all over the mid-south...try not to go too far north of 64 if I can help it, and will head South any day of the year in any weather. My first solo trip to Laredo many moons ago as a company driver, it was well over 100 degrees in South Texas, and even though the AC worked, I wasn't using it...had the windows open enjoying the fresh air. Hell, I went 8 or 9 years without even running the AC at the house! Then the wife moved in and she turns the stupid thing on in May...ridiculous.

AC is a luxury item...completely unnecessary for a healthy individual.

Pedigreed Bulldog, Aug 10, 2016

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MACK E-6 Moderator Staff Member

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Shoestring said: ↑

It's a truck, when moving there's plenty of airflow. Look at guys doing road construction, all day long working around hot blacktop, in the boiling sun.
I drive all day in Florida, haven't ran the AC in 2 years. just roll down the windows and your good to go.
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alghazi said: ↑

Absolutely absurd.
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Agreed.

Oh sure. Not a safety concern at all.

....Until it rains, the humidity goes up 30 points, and you can't keep the windows clear because they're fogging up.

MACK E-6, Aug 10, 2016

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AModelCat Road Train Member

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DOT and shops seem to thrive on the old fallacy that "everything has to work." We had a truck fail a CVI because a light inside a cabinet was burned out.

Last edited: Aug 10, 2016

AModelCat, Aug 10, 2016

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superflow Road Train Member

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Yeah it shouldn't a big deal but I know there are some companies that won't fix their equipment as long as that equipment is rolling
.... I understand some drivers just have to stomach it, I've worked for a few companies like this myself

superflow, Aug 10, 2016

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MACK E-6 Moderator Staff Member

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Pedigreed Bulldog said: ↑

Hell, I don't consider myself "old", but we didn't have A/C in the house I grew up in. Wasn't until we moved summer before middle school that we had that "luxury".

No such rule exists. REQUIRED equipment must work. Extra stuff NOT required does NOT have to work. Even with your lights. You can have 1,000,000 chicken lights on your truck and 3/4 of them can be burned out...but as long as the REQUIRED handful of lights are working, there ain't a darn thing the DOT can do about the 750,000 burned out auxiliary lights.

AC didn't work when I bought my truck. You know what I did? I pulled the compressor, condenser, dryer, lines, brackets, and everything else AC related out and pitched it. Dropped 40 pounds off my tare weight. That was 800,000 miles ago, and I've been all over the mid-south...try not to go too far north of 64 if I can help it, and will head South any day of the year in any weather. My first solo trip to Laredo many moons ago as a company driver, it was well over 100 degrees in South Texas, and even though the AC worked, I wasn't using it...had the windows open enjoying the fresh air. Hell, I went 8 or 9 years without even running the AC at the house! Then the wife moved in and she turns the stupid thing on in May...ridiculous.

AC is a luxury item...completely unnecessary for a healthy individual.
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"Luxury" my ###.

It's not a "luxury" to be able to keep the humidity down in one's cab so they can keen their windows fog free and avoid hitting the idiot crawling along through the thunderstorm without his lights on.

It's not always about "comfort".

MACK E-6, Aug 10, 2016

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bottomdumpin and HalpinUout Thank this.
Pedigreed Bulldog Road Train Member

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800,000 miles in this truck with no AC and I have yet to have my windows fog up in the rain or any other time, so I don't buy that line you're trying to feed me.

Pedigreed Bulldog, Aug 10, 2016

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MACK E-6 Moderator Staff Member

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You don't have to. I've seen it happen when my own a/c was on the fritz.

MACK E-6, Aug 10, 2016

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Guess that just means you're doing it wrong!

Pedigreed Bulldog, Aug 10, 2016

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HalpinUout Road Train Member

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Pedigreed Bulldog said: ↑

800,000 miles in this truck with no AC and I have yet to have my windows fog up in the rain or any other time, so I don't buy that line you're trying to feed me.
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I drive a truck now with no AC and my windows fog up to the point of not being able to see when it's raining hard with how humid it is out

HalpinUout, Aug 10, 2016

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