Where are the fan relays on an Impala?

In your lower underhood fuse block on the passenger side, there are three relays that control your fans. They go #3 , #2 , #1 (L to R I believe). #1 controls the primary cooling fan (driver’s side), #2 is the cooling fan control relay, and #3 is the secondary cooling fan (passenger side).

When to turn off the fans on an Impala?

•When A/C is requested and the ambient temperature is more than 10°C (50°F). •A/C refrigerant pressure exceeds 1310 kPa (190 psi). •After the vehicle is shut off if the engine coolant temperature at key-off is more than 117°C (243°F) and system voltage is more than 12 volts. The fans will stay on for approximately 3 minutes.

Why does my AC fan keep burning out on my Chevy Impala?

02 impala, fan fuse kept burning out. ac fan still working but cooling fan fuse kept burning up as soon the fan start up. 54 people found this helpful. 18 people found this helpful. Try removing all fan relay’s coat them with dielectric grease, plug them back in and this should work. 13 people found this helpful.

What should the fan temp be on an Impala 3.8?

Stock fan turn on temp is low at 220 and high fan is around 225-230. Since the motor is all aluminum, unlike the 3.8, they can get away with it. Click to expand…

Why is the AC not working on my Chevy Impala?

While there are a variety of reasons your Chevrolet Impala air conditioning won’t work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.

Why does my Impala have a flashing light?

Don’t know about what happens when low on R134 – but the flashing light thing was what mine was doing, finding that the compressor had shelled out. IIRC, it was around 105K miles. Could just be a low charge, definitely worth checking. This is for our 2007 Impala with a 3.9L V6 with 118k miles.

When did the Chevy Impala fuse box come out?

In this article, we consider the eighth-generation Chevrolet Impala, produced from 2000 to 2005. Here you will find fuse box diagrams of Chevrolet Impala 2000, 2001, 2002, 2003, 2004 and 2005, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

What happens when an AC pressure switch fails?

Unable to cool the car If either of the AC pressure switches fails, then the system will have a difficult time maintaining the pressure required to function properly. If the pressure is not right, then the AC system will not be able to produce the cold air required to adequately cool the cabin.

When to turn off the coolant on an Impala?

•Engine coolant temperature exceeds approximately 103°C (217°F). •When A/C is requested and the ambient temperature is more than 10°C (50°F). •A/C refrigerant pressure exceeds 1310 kPa (190 psi). •After the vehicle is shut off if the engine coolant temperature at key-off is more than 117°C (243°F) and system voltage is more than 12 volts.

How to remove a fan control switch on a Chevy Impala?

Pull the bezel off of the dash. Pull the ashtray out of the dashboard by depressing the button on the inside lip of the ashtray. Unscrew the panel around the ashtray with the Phillips screwdriver and the 1/4-inch ratchet and socket. Pull the panel straight back off of the dashboard.

Stock fan turn on temp is low at 220 and high fan is around 225-230. Since the motor is all aluminum, unlike the 3.8, they can get away with it. Click to expand…

Why are the fans not running in my Chevy Impala?

Removing the wire from the temp sensor puts the fans into stay-alive mode, and they run constantly as you found out. Have the relay replaced and you should be fine. As far as the AC, it is most likely related to your cooling fan problem. In order not to increase engine heat, the AC is determining that it has to stay off to keep the engine cool.

What do I need to know about my Chevy Impala?

The body computer switches the relay ground circuits on or off depending upon the various input values. If the relays are all functioning correctly, then you’ll want to check the engine coolant temp sensor, the wiring from the relays to pcm, and the a/c charge level.

What should the fuses be on a cooling fan?

There should be three fuses as well, labelled Cooling Fans, Fan Cont #2 & #3 , Fan Cont #1 . Edit: Actually, I would check the fuses first, then the relays. If they’re all okay, it might be a bad ground (they can do straaaange things) or a bad fan.

What should I do if my Impala cooling fans are not working?

I did replace the fans with similar ones from an Impala in the junkyard, plugged both fans in and bolted them onto the radiator, so everything appears to be hooked up right.

Why does my Fuse for the radiator fan keep blowing?

BUT, if there is a short circuit before the fan, it will blow the fuse. Check the wiring is not chaffed or worn between fuse box and fan, or switch to fan. Unplug the radiator fan, replace the fuse and see if it blows again. If not, then its likely the radiator fan is shorted. Use an ohm meter and see what the resistance is.

What to do if your Chevy Impala cooling fan is not working?

What’s the low pressure sensor on a Chevy Impala?

Almost forgot to mention that the a/c low pressure side sensor also provides an input to the body pcm. Also if memory serves on this; low side pressure needs to be at least 40 PSI in order for the pressure switch to send the signal to pcm. 4 people found this helpful.

Where are the fan relays on an Impala?