Air Conditioning Problem

Bswanny · 08-15-2019, 09:25 AM

Does anyone know why my Fan won't blow AC on "Auto" like it normally would but works if it turn the fan up to max. Keep in mind the ambient tempature is higher in cabin than the set 60 degrees so on Auto it normally would be blowing at max even though it isn't set at max to get the cabin up to tempature fast. Help

Spartan 1771 · 08-15-2019, 09:38 AM

Although this is for a Camry, it sounds like the same problem.

https://youtu.be/33fqw0k_qkM

Spooler · 08-15-2019, 09:50 AM

Sounds like the fan resistor pack is done. It should be in the fan housing. I forget the exact name of the part.

Bswanny · 08-15-2019, 11:12 AM

Is it a resistor or relay that I am after?

Spooler · 08-15-2019, 12:21 PM

Quote:

Originally Posted by Bswanny

Is it a resistor or relay that I am after?

It should be a resistor. It will be after the fan. May be a box or on a blade looking thing. It controls the fan speed. When it goes out, you only get high speed.

Ghostvette · 08-15-2019, 12:23 PM

Quote:

Originally Posted by Spooler

Sounds like the fan resistor pack is done. It should be in the fan housing. I forget the exact name of the part.

Quote:

Originally Posted by Bswanny

Is it a resistor or relay that I am after?

Blower motor resistor. Two ways to find it, follow the wires from the fan back to it, or use Google.

Bswanny · 08-15-2019, 02:20 PM

Service manual only talks about the "AC Relay" as far as a check between the wiring. Is that what is being discussed. Zero mention of a Blower relay ect in the manual. Just says AC relay under the hood with the rest of the relays

Bswanny · 08-15-2019, 02:26 PM

This is atleast how I read it?

Spooler · 08-15-2019, 03:05 PM

So what exactly is your issue. Is you blower motor only working on High? Is your auto A/C not blowing appropriately for the temp in the car?

Bswanny · 08-15-2019, 04:39 PM

Quote:

Originally Posted by Spooler

So what exactly is your issue. Is you blower motor only working on High? Is your auto A/C not blowing appropriately for the temp in the car?

Correct. All of a sudden when in "Auto" mode, the fan blows very little to no air. When cranked to max it blows fine. Tempature set at 60 degrees on a 85 degree day.

Ghostvette · 08-15-2019, 05:02 PM

Quote:

Originally Posted by Bswanny

Correct. All of a sudden when in "Auto" mode, the fan blows very little to no air. When cranked to max it blows fine. Tempature set at 60 degrees on a 85 degree day.

Does it work if you take it out of 'Auto'? If so, it's likely the amp is bad...

or you have some other issue. CAN bus reader would be helpful.

Bswanny · 08-15-2019, 10:38 PM

Quote:

Originally Posted by Ghostvette

Does it work if you take it out of 'Auto'? If so, it's likely the amp is bad...

or you have some other issue. CAN bus reader would be helpful.

If I take it out of auto it works. Trying to figure out why just the "auto" setting doesn't work now

Spooler · 08-15-2019, 10:58 PM

Quote:

Originally Posted by Bswanny

If I take it out of auto it works. Trying to figure out why just the "auto" setting doesn't work now

It may be one of your sensors. The in vehicle or the sun load sensor I would think. It could be the auto amp.

08-15-2019, 09:25 AM	#1 (permalink)
Bswanny Base Member Join Date: Mar 2018 Location: New Mexico Posts: 135 Drives: 20 370Z Sport Rep Power: 7	Air Conditioning Problem Does anyone know why my Fan won't blow AC on "Auto" like it normally would but works if it turn the fan up to max. Keep in mind the ambient tempature is higher in cabin than the set 60 degrees so on Auto it normally would be blowing at max even though it isn't set at max to get the cabin up to tempature fast. Help

08-15-2019, 09:38 AM	#2 (permalink)
Spartan 1771 A True Z Fanatic Join Date: Nov 2009 Location: Western Maryland Posts: 1,280 Drives: Wife crazy & 09 370Z Rep Power: 105454	Although this is for a Camry, it sounds like the same problem. https://youtu.be/33fqw0k_qkM __________________ ~Rob -DD Air Guide, Stillen G3 CAIs, 63mm Throttle Bodies, Motordyne M370, Berk HFCs, FI TDX CBE (non-res, CF), Sprint booster v3, Ecutek Dyno Tuned, and the list goes on...

08-15-2019, 11:12 AM	#4 (permalink)
Bswanny Base Member Join Date: Mar 2018 Location: New Mexico Posts: 135 Drives: 20 370Z Sport Rep Power: 7	Is it a resistor or relay that I am after? Last edited by Bswanny; 08-15-2019 at 11:15 AM.

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08-15-2019, 09:50 AM	#3 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,797 Drives: 2013 Nismo 370z Rep Power: 2684392	Sounds like the fan resistor pack is done. It should be in the fan housing. I forget the exact name of the part.

08-15-2019, 02:20 PM	#7 (permalink)
Bswanny Base Member Join Date: Mar 2018 Location: New Mexico Posts: 135 Drives: 20 370Z Sport Rep Power: 7	Service manual only talks about the "AC Relay" as far as a check between the wiring. Is that what is being discussed. Zero mention of a Blower relay ect in the manual. Just says AC relay under the hood with the rest of the relays

08-15-2019, 03:05 PM	#9 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,797 Drives: 2013 Nismo 370z Rep Power: 2684392	So what exactly is your issue. Is you blower motor only working on High? Is your auto A/C not blowing appropriately for the temp in the car?