Question about 2002 Chevrolet TrailBlazer

1 Answer

Surging Found the broblem was the a/c unit going bad because the a/c circulates on the defrost cycle. I disconnected the pin plug on the side but as long as the defrosters are on it still does it if anyone knows if there is another electrical connection on the a/c unit please let me know or do i have to remove the clutch. Im in penna and need the defroster. Thanks geo

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that got 5 achievements.


    An expert whose answer got voted for 20 times.


    An expert who has answered 20 questions.

  • Contributor
  • 31 Answers

Yes, there is a connector on the clutch itself. The clutch is electromagnetic, so it needs to be energized to engage the compressor. Disconnect that plug (generally just 2 wires) and your A/C is disabled. You should not have to remove the clutch to do so. You could also disconnect the low pressure switch. That is generally located on the dryer (large canister like object). The will disable the A/C too.

Posted on Feb 04, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

The freezer doesn't freeze that good but the refridgerator does work.

It is possible that the defrost cycle is not working. Look for signs of ice built up in the freezer compartment. The excess ice prohibits the air circulation.

26128165-5xkmzur1kbcrfneaoxy43scu-3-0.jpg If defrost cycle appears working and compressor runs continuously it is probable that the Freon is low or compressor is failing.

the usual tell is the refrigerator gets colder than usual and the freezer does not get as cold. The situation is that the compressor runs until the freezer temperature is satisfied. If the compressor can not achieve the cold temperature of the freezer it will run continuously.

When the unit runs continuously the bi-pass of air is increased bringing more cold air into the refrigerator portion of the unit.

Mar 13, 2016 | Cars & Trucks

2 Answers

1986 Chevy Nova - the defroster/heater vents stopped working. Any ideas? Before they found the found the fuel filter, they messed with the air filter. Could that be the problem?

If the air vent mode doors are vacuum operated, (though some are cable operated), they could have disconnected a vacuum line from engine. A vacuum diagram sticker should be located under the hood. The a/c hose will be listed as (HVAC hose).

Jan 15, 2014 | 1986 Chevrolet Nova

1 Answer

Code 12 1995 dodge spirit 2.5 battery and PCM NOT disconnected. where does the pin 3 on PCM gets its battery suppy voltage from

Has the battery been disconnected or been low on charge in the last 50 ignition cycles?

Code 12 means that battery power has been disconnected within the last 50 ignition cycles. it does not mean there is no battery power to the computer

Pin 3 should be a red/white wire that is the constat power supply to the PCM. It is protected by a fusible link located neer the drivers side strut tower. If that link was bad the car would not start or run as it also supplieds power to the asd relay, fuel pump relay, and the ssd relay.

I would put money on the the problem being igntion (plugs wires cap rotor), compression (low cylinder compression usually cylinders 2 and 3), lack of fuel delivery (low fuel pressure, a weak or dirty injector), timin (timing belt jumped, worn distributor, look exciter ring), or possibly a plugged catalytic converter.

I would check compression first especially cylinders 2 and 3. It was pretty common for the head gasket to fail in between these two cylinders.

Feb 24, 2012 | 1995 Dodge Spirit

1 Answer

Low coolant light flashes continually/coolant not low nor found no visible leaks/'98 Pontiac Grand Prix GT

if it is NOT low, and the car is NOT running hot, the problem is in the sender unit in the surge tank, located at the bottom of the unit-it does go bad, and the only solution is to replace the surge tank (they did not design them to be removed from the tanks)-be certain it is not low, though before you do this-unplug the sender unit and install a resistor (2200 ohm from Radio Shack, about 20 cents)-between the wires from the disconnected connector-no more dash light, but now you will not have an 'idiot' light for you tank should it run low, so you will need to check it.

Jun 10, 2011 | Pontiac Grand Prix Cars & Trucks

2 Answers

2006 jaguar x type no heat AC works great. When I switch to heat still cold. heater hoses are hot and circulating. any ideas?

I don't have that much experience with jaguars, but I do with your problem. If your controls are working properly, ie goes to defrost, floor, vent. then the blend door motor is not working. It is usually located in the middle of the car, behind the control panel, You might be able to access it from the passenger side. two or three screws hold it on. If you can get to it, I would pull the wire plug and put it back in to see if it is a bad connection first. If not then replace the motor.
Hope this helps you

Nov 09, 2010 | 2006 Jaguar X-Type

1 Answer

Engine surges especially at low speeds

Disconnect your MAF sensor and take the Astro for a ride. If you notice an improvement; Try cleaning the MAF with CRC MAF sensor cleaner.


Dec 10, 2009 | 2000 Chevrolet Astro

1 Answer

Heater/defrost doesnt blow hot heater hoses one

The heater core is probably clogged. The best method i have found is to remove the heater hoses, and blast compressed air into one side or the other in short bursts. This will tend to launch a clump of sludge out of the other side, and is very messy. Once the heater core is unclogged and reconnected, it is a good idea to chemically flush the entire cooling system, then flush with clean water and refill with universal coolant.

Nov 18, 2009 | 2000 Chevrolet Silverado 1500

1 Answer

No power in AC system except recirculate light

The Control Module In The Dash Is Known To Go Bad.
These Can Be Found For As Little As 29.95 And Up to 500.00 Plus The Cost Of A Vw Tech Install
But Can Easily Be Done Yourself By Plugging In A Wire Harness And Hooking Up The Wires For The Temp Control And The Defrost Selector.

Also You can find The Blower motor On The Passenger side floor Back Wall
You Can Also Test The Blower With A Simple 12Volt Car Battery

Thanks Bryan
Any More Questions Just Ask

Jun 29, 2009 | 1999 Volkswagen Beetle

1 Answer

Disconnecting the power cable for the driver side mirror housing

it is under the defroster grid. you remove both A-pillar trim pieces first(they just pull off [plastic clips holding them]]) then the defroster grid(giant piece of plastic sweeping accross the dash) will also lift up[plastic clips holding it down] you cant miss it. very long pigtail to mirror will be in plain view above the speedometer.

Apr 07, 2009 | 2001 Chrysler Town & Country

2 Answers

2006 Dodge ram-a/c-heater fan works fine,all speeds,low to high-but no matter what speed I turn it to only a little air comes out,heat,defroster,a/c vents etc.

Does your blower have a vibration at higher speeds? Have the same problem in my truck. After digging into it I found that the Re-circulation door axle pivot is broken. This door shuts off the outside air intake for re-circulating air. It also closes off the interior air intake when re-circ isn't used. If the door is broken it will sit in a half open position allowing all the forced air to escape through the outside air intake. I hear this is a common thing to happen. The servo motor that cycles the door is a little too powerful and it snaps the axle pivot.

Mar 17, 2009 | 2006 Dodge Ram 1500

Not finding what you are looking for?
2002 Chevrolet TrailBlazer Logo

94 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

77932 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides