Heater on passenger side stopped working, fan still works properly. Driver side is ok, any helpful link?

do not use WD40 it is not a lubricant.
copy and paste


https://fuse-box.info/infiniti/infiniti-m45-y34-2003-2004-fuses-and-relays

Does it work on any setting? Like 1 2 3 or 4?? If only works on say...4 then it's your resistor in the switch. Not bad easy fix. YouTube or Google it. You'll see

Hi Anonymous

I trust you are well.

If your car does not have individual settings for the heater for the passenger and driver sides then I would suggest that this is not normal.

Hope this helps

Kind regards

The rotary control switch on the dash controls the blower motor for the A/C. The A/C will not turn on unless the blower motor is functioning properly. The passenger-side radiator fan will not turn on until the A/C begins running. BUT the driver's side radiator fan should always work. Ergo, check the function of the blower motor (located underneath the dash behind the glove box). Usually when it goes bad, it's because of the blower motor RESISTOR (mounted inside the blower motor housing). When the resistor goes bad, the blower motor shorts out, causing it to fail. The switch rarely ever fails. The radiator fan relays are located next to & on both ends of the radiator. Check them too. In the link, the blower motor RESISTOR is #5.
Acura Parts AcuraOEMparts com Genuine Acura OEM Parts from Delray Acura

To troubleshoot this types of problem,click the link below :----http://howtobyme.blogspot.in/2012/02/heater-blows-only-from-defrost.html
--------Go through the procedure to confirm the issue.

------
Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

---------
Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

-----------

No heat on car? http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

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Heater blows intermittently and temp gauge goes erratic? http://technoanswers.blogspot.com/2012/01/heater-blows-intermittently-and-temp.html------------Heater blows cold? http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html
---------Car heater blowing warm, but not hot air? http://schematicsdiagram.blogspot.com/2011/12/car-heater-blowing-warm-but-not-hot-air.html-------- Heater/AC blower motor not working?

http://technoanswers.blogspot.in/2012/02/heaterac-blower-motor-not-working-on.html

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A/C, heater, defroster fan, not working? http://technoanswers.blogspot.in/2012/02/ac-heater-defroster-fan-not-working.html Heater problem? http://technoanswers.blogspot.in/2012/02/heater-problem-on-isuzu-trooper.html---------

This will help.Thanks.

To troubleshoot this types of problem,click the link below :----http://howtobyme.blogspot.in/2012/02/heater-blows-only-from-defrost.html
--------Go through the procedure to confirm the issue.------
Engine Overheats and heater blowing cold? http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html
---------Heat blows cold on drivers side and hot on passenger side? http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html
-----------
This will help.Thanks.

For this types of problem,i suggest you to check this help links:----Car heater blowing warm, but not hot air?http://schematicsdiagram.blogspot.com/2011/12/car-heater-blowing-warm-but-not-hot-air.html
---------A/C, heater, defroster fan, not working?http://technoanswers.blogspot.in/2012/02/ac-heater-defroster-fan-not-working.html
--------Heater problem?http://technoanswers.blogspot.in/2012/02/heater-problem-on-isuzu-trooper.html
---------Engine Overheats and heater blowing cold?http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html
-----------Heat blows cold on drivers side and hot on passenger side?http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html----------------This will help.Thanks.

It would be best to start by having DTC'S - diagnostic trouble codes checked ! Dealer or someother qualified shop that has a professional type scan tool , autozone or any other part store's tool will not read these codes .

DTC B1310 Ambient Air Temp Sensor Open Circuit
DTC B1311 Outside Air Temp Sensor Short Circuit
DTC B1312 High Side Temp Sensor Open Circuit
DTC B1313 High Side Temp Sensor Short Circuit
DTC B1314 Evaporator Inlet Temp Sensor Open CKT
DTC B1315 Evaporator Inlet Temp Sensor Short CKT
DTC B1316 In Car Temperature Sensor Open Circuit
DTC B1317 In Car Temperature Sensor Short Circuit
DTC B1318 Sunload Sensor Open Circuit
DTC B1319 Sunload Sensor Short Circuit
DTC B1340 Air Mix Door #1 Movement Problem
DTC B1341 Air Mix Door #2 Movement Problem
DTC B1347 Very Low A/C Refrigerant Warning
DTC B1348 Very Low A/C Refrigerant Pressure
DTC B1350 Engine Coolant Over-Temperature

Air Temperature Control Inoperative - Passenger

Circuit Description
The heater and A/C programmer receives the requested temperature offset on CKT 831 (DK BLU/WHT) from the passenger climate control. The heater and A/C programmer controls the on and off status of the passenger climate control on CKT 1336 (DK BLU).

Test Description
Checks the temperature control (full hot) of the Passenger Climate Control. Also verifies the condition of CKT 831.
Checks the temperature control (full cold) of the Passenger Temperature Control. Also verifies the condition of CKT 831.
Checks the ON/OFF switch of the Passenger Temperature Control. Also verifies the condition of CKT 1336.
Checks the ON/OFF switch of the heater and A/C programmer. Also verifies the condition of CKT 1336.
Checks terminal condition of the heater and A/C programmer.

Do you know how to do automotive electrical testing ???????


1
Turn the ignition to the ON position.
Turn the passenger climate control to full hot.
Measure the voltage at terminal D13 of the heater and A/C programmer.
Is the voltage measured equal to the specified value?
12 V
YES - Go to Step 2
NO - Go to Step 8
2
Turn the passenger temperature control to full cold.
Measure the voltage at terminal D13 of the heater and A/C programmer.
Is the voltage measured equal to the specified value?
0 V
YES - Go to Step 3
NO - Go to Step 8
3
Press and hold down the passenger temperature control.
Measure the voltage at terminal C16 of the heater and A/C programmer.
Is the voltage measured equal to the specified value?
0 V
YES - Go to Step 4
NO - Go to Step 9
4
Release the passenger temperature control.
Measure the voltage at terminal C16 of the heater and A/C programmer.
Is the voltage measured equal to the specified value?
12 V
YES - Go to Step 5
NO - Go to Step 9
5
Turn OFF the passenger temperature control.
Measure the voltage at terminal D10 of the heater and A/C programmer.
Is the voltage measured equal to the specified value?
12 V
YES -- Go to Step 6
NO - Go to Step 10
6
Turn ON the passenger temperature control.
Measure the voltage at terminal D10 of the heater and A/C programmer.
Is the voltage measured less to the specified value?
12 V
YES - Go to Step 7
NO - Go to Step 10
7
Inspect the terminal contact at the heater and A/C programmer.
If OK, replace the heater and A/C programmer. Refer to Programmer Replacement
Is the repair complete?
--
System OK
--
8
Inspect CKT 831 (DK BLU/WHT) for an open or short.
If OK, replace the passenger temperature control. Refer to Control Assembly Replacement - Passenger
Is the repair complete?
--
System OK
--
9
Inspect CKT 1336 (DK BLU) for an open or short.
If OK, replace the passenger temperature control. Refer to Control Assembly Replacement - Passenger
Is the repair complete?
--
System OK
--
10
Inspect CKT 1370 (PPL) for an open or short.
If OK, replace the passenger temperature control. Refer to Control Assembly Replacement - Passenger
Is the repair complete?
--
System OK
--

There are different fuses. check your fuses properly.

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