Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2021TRANSIT-350 HD BASE, VAN CARGO EXTENDED, 3.5L ENG VIN 8, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 198 (CLIMATE CONTROL SYSTEM - GENERAL INFORMATION (2 OF 2))DIAGNOSIS AND TESTINGCLIMATE CONTROL SYSTEM - VEHICLES WITH: ELECTRONIC MANUAL TEMPERATURE CONTROL (EMTC)SYMPTOM CHART(S)SYMPTOM CHART: CLIMATE CONTROL - ELECTRONIC MANUAL TEMPERATURE CONTROL (EMTC)
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD
Symptom Chart: Climate Control - Electronic Manual Temperature Control (EMTC)
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWDSECTION Symptom Chart: Climate Control - Electronic Manual Temperature Control (EMTC)
WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
Symptom Chart
| Condition | Possible Sources | Actions |
|---|---|---|
| A module does not communicate with the diagnostic scan tool | Fuse(s) Wiring, terminals or connectors FCIM |
REFER to: Communications Network . |
| Unable To Duplicate The Customer Concern And No Diagnostic Trouble Codes (DTCs) Present | Refer to Pinpoint Test | GO to Pinpoint Test C |
| The electric booster heater is inoperative or does not operate correctly | Refer to Pinpoint Test | GO to Pinpoint Test Q |
| Reduced outlet airflow | Plugged cabin air filter | INSPECT the cabin air filter. REFER to: Cabin Air Filter . If OK, DIAGNOSE for low refrigerant charge, A/C always commanded on or blower motor not operating correctly. |
| Improper refrigerant level | CARRY OUT the refrigerant system tests. Refer to the appropriate Refrigerant System Tests procedure in GENERAL PROCEDURES If refrigerant charge is OK, GO to Pinpoint Test H | |
| Blower motor | GO to Pinpoint Test K | |
| The air inlet door is inoperative | Refer to Pinpoint Test | GO to Pinpoint Test D |
| Incorrect or erratic direction of airflow from outlets | Refer to Pinpoint Test | GO to Pinpoint Test E |
| Insufficient, erratic or no heat | Refer to Pinpoint Test | GO to Pinpoint Test F |
| The A/C is inoperative | Refer to Pinpoint Test | GO to Pinpoint Test G |
| The A/C is always on -- A/C mode always commanded ON | Refer to Pinpoint Test | GO to Pinpoint Test H |
| Temperature control is inoperative/does not operate correctly | Refer to Pinpoint Test | GO to Pinpoint Test I |
| The blower motor is inoperative | Refer to Pinpoint Test | GO to Pinpoint Test J |
| The blower motor does not operate correctly | Refer to Pinpoint Test | GO to Pinpoint Test K |
| Insufficient A/C cooling | Improper refrigerant level | CARRY OUT the refrigerant system tests. Refer to the appropriate Refrigerant System Tests procedure in GENERAL PROCEDURES If OK, DIAGNOSE for a temperature door actuator not operating correctly. |
| Temperature door actuator | GO to Pinpoint Test I | |
| A/C pressure relief valve discharging | A/C pressure relief valve | CHECK the high side system pressure. If the pressure is below the A/C pressure relief valve open pressure, 3, 447-4, 137 kPa (500-600 psi), INSTALL a new A/C Compressor. REFER to: Air Conditioning (A/C) Compressor - 6.2L V8 . REFER to: Air Conditioning (A/C) Compressor - 6.8L Triton-30V - V10 . REFER to: Air Conditioning (A/C) Compressor - 6.7L Power Stroke Diesel . |
| High system pressure | CHECK the high side system pressure. If the system pressure is above the A/C pressure relief valve open pressure 3, 447-4, 137 kPa (500-600 psi), REPAIR the A/C system for a restriction. | |
| Climate control does not operate only when remote start is used | IPC information display settings Non-Ford approved remote start system installed |
VERIFY Remote Start - Message Center Set To Auto, or Remote Start - Message Center Set To Last User Settings. REFER to: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) - System Operation and Component Description
. VERIFY module communications network operation. DIAGNOSE Diagnostic Trouble Codes (DTCs) if present. |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.