Passenger heated/cool seats not working

The diagnostic process for the heating and cooling is a very long and involved process and requires a couple of specialized diagnostic tools that you may not have.

Here are some of the easier things to physically check, which can be preventing the proper function of the seats:

Mechanical

• Seat track

• Climate controlled seat ducts

Electrical

• Climate controlled seat ducts
• Fuse(s)
• Circuitry
• Driver seat module (DSM)
• Lumbar control switch
• Memory set switch
• Power seat motor
• Seat control switch
• Seat fan motor
• Climate controlled seat module
• Climate controlled seat switch

There are a few potential causes for this issue with the driver's heated seat in your 2013 F150 F150 FX4:

1. Faulty seat control module: The seat control module is responsible for controlling the heating and cooling functions of the seat. If it is faulty, it may cause the seat to function improperly.
2. Wiring issue: There may be a problem with the wiring that connects the seat control module to the seat heating and cooling elements.
3. Faulty seat heating and cooling elements: The heating and cooling elements in the seat may be faulty and not functioning properly.

To fix this issue, you will need to diagnose and troubleshoot the problem. This may involve checking the wiring, testing the seat control module, and inspecting the seat heating and cooling elements. It is recommended to have a mechanic or dealership technician diagnose and fix the issue, as they will have the necessary tools and expertise to properly troubleshoot and repair the problem.

Air Circulation
When the heated/cool seat switch is pressed to initiate operation of the climate control seat (CCS) system, cabin air is drawn through the heated/cool ventilation module air filter, then directed through passages in the foam of the seat cushion and seat back to the seat's occupant. In order for the CCS system to operate to its optimum performance, it is crucial to have unrestricted air flow through the system. A dirty or restricted air filter, the blockage of an exhaust air duct, a misaligned heated/cool ventilation module, or incorrect foam installation of the seat cushion or seat back will all have negative effects on CCS operation.
Heated/Cool Ventilation Module
Each heated/cool seat has 2 ventilation modules, one located under the seat cushion and one located in the seat back. These modules are controlled by the climate control seat module (CCSM). Each ventilation module contains a thermo-electric device (TED), a temperature sensor, and a blower motor. The TED and temperature sensor are mounted downstream of the blower motor. Each TED consists of a circuit of positive and negative connections sandwiched between 2 ceramic plates. Each ceramic plate is equipped with copper fins for heat exchange. The air flowing past these fins is either directed as conditioned air into the seat cushion and seat back, or directed into the cabin as waste air.
A TED is essentially a solid state heat pump that is used to heat or cool the air supply to the seat cushion and seat back. When voltage is applied to a TED, one side releases energy as heat, while the opposite side absorbs energy and gets cold. When the polarity of the current flow to the TEDs is switched, the hot and cool sides of the TED reverse.
During the following climate control seat system description and operation, the TEDs, blower motors, and temperature sensors will be referenced independently even though they are all packaged together as a module.
Climate Control Seat (CCS) System
The CCS system consists of two heated/cool ventilation modules and one climate control seat module (CCSM) that controls both the driver and passenger heated/cool seats systems. The CCSM is mounted below the front passenger seat cushion. It receives power from both, battery positive voltage and ignition 3 voltage.
Once a CCS system is activated, cabin air is drawn through the seat blower motors and directed across the fins of each of the thermo-electric device (TED) located under the seat cushion and in the seat back. The air is either heated or cooled as it passes over the TEDs. This conditioned air is then directed through channels in the foam of the seat pad and through small holes in the seat cover to the occupant. Once the system is activated, the CCSM uses a set of algorithms to control the temperature of the selected heating or cooling modes.
Your best bet is to take your vehicle to a qualified repair shop an have it diagnosed .
DTC B19A4: Driver Seat Back Blower Speed Circuit High

DTC B19A8: Driver Seat Back Blower Speed Circuit Short to Ground

DTC B103D: Driver Blower Power Circuit

DTC B272E: Driver Seat Back Blower Circuit Open
DTC B19A3: Driver Seat Cushion Blower Speed Circuit High

DTC B19A7: Driver Seat Cushion Blower Speed Circuit Short to Ground

DTC B2729: Driver Seat Cushion Over Temperature
DTC B19A2: Passenger Seat Back Blower Speed Circuit High

DTC B19A6: Passenger Seat Back Blower Speed Circuit Short to Ground

DTC B111D: Passenger Blower Power Circuit

DTC B272F: Passenger Seat Back Blower Circuit Open
DTC B19A1: Passenger Seat Cushion Blower Speed Circuit High

DTC B19A5: Passenger Seat Cushion Blower Speed Circuit Short to Ground

DTC B272A: Passenger Seat Cushion Over Temperature
Driver and Passenger Heated/Cool Seats Inoperative

1. Ignition OFF, disconnect the C1 harness connector at the CCSM.
2. Test for less than 5 ohms between the ground circuit terminal M and ground.
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If greater than the specified range, test the ground circuit for an open/high resistance.

3. Verify that a test lamp illuminates between the B+ circuit terminal E and ground.
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If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

4. Disconnect the C2 harness connector at the CCSM.
5. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.
?‡'
If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

6. If all circuits test normal, replace the CCSM.

Sorry

How to Fix Broken not working seat Heater 2003 10 Cadillac CTS CHEVY GMC SEAT HEATER TROUBLESHOOTING

could be that a separate fuse runs the element to heat the seat, or relay. try unplugging the connector under the seat and replug in to see if that fixes it. check for power at the feed side of the loom plug before you replug it to the seat .

Check continuity on the seat heaters. If that's ok, check the grounds. Check power to the heaters while you are there.

I have the same problem with my 03 2500 sierra hd driver seat. lights up for a split second but shuts off. Passenger seat heats fine. Any fix yet?

If the passenger heated seat still works, the grid went bad in the drivers seat for one relay operates both seat heaters

MORE THAN LIKELY THE HEATING ELEMENT HAS MALFUNTIONED. ITS A PRETTY COMMON PROBLEM IN HEATED SEATS

Identical thing here with my '03 Surburban LT.