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SINOTRUK SITRAK C7H/T7H HOWO T7/TX Automatic A/C & Heater Control Panel Assembly 712W619420630
SINOTRUK (SITRAK/HOWO) HVAC & Climate Control System Maintenance BOM Detail
| No. | Component Name (EN) | SINOTRUK Part No. / Reference | Qty | Unit | Replacement / Inspection Suggestion |
|---|---|---|---|---|---|
| 1.0 | Climate Control Modules | ||||
| 1.1 | Automatic Climate Control (ATC) Panel Assembly | 712W61942-0630 | 1 | Pcs | Core Replacement: Replace as a whole unit if the screen goes black, buttons fail, or the mainboard burns out. |
| 1.2 | Panel Mounting Base & Flame-Retardant Clips | 712W61942 Related Plastic Parts | 1 | Set | Optional. Heavy truck dashboard plastic tabs are brittle and easily snap during multiple disassemblies. |
| 2.0 | Actuators & Speed Regulators | ||||
| 2.1 | Blower Motor Resistor / Power Regulator Module | WG1664130009 (or 712W equivalent) | 1 | Pcs | High-Failure Part: Must be replaced if the air volume cannot be adjusted, stuck at max speed, or fails to blow. |
| 2.2 | HVAC Blower Motor Assembly (24V) | WG1664130010 (or with housing) | 1 | Pcs | Replace based on condition. Change if there is abnormal noise, bearing play, rotor dragging, or motor burnout. |
| 2.3 | Mode / Blend Air Damper Stepper Motor | 712W61942 Cascaded Universal Motor | 2-3 | Pcs | Replace if the air direction fails to switch (e.g., face/foot modes) or hot/cold air mixing is unresponsive. |
| 3.0 | System Sensors | ||||
| 3.1 | Evaporator Core Temperature Sensor Harness | 712W61942-XXXX (with 2-pin plug) | 1 | Pcs | Recommended: Top troubleshooting priority if the AC system freezes up, or the compressor short-cycles / fails to engage. |
| 3.2 | In-Cabin Temperature Sensor (with Micro-Fan) | Center dashboard integrated type | 1 | Pcs | Replace if the automatic temperature control goes haywire or loses consistency. |
| 3.3 | Ambient Air Temperature (AAT) Sensor | WG1664580015 (or grille equivalent) | 1 | Pcs | Replace if the dashboard display shows incorrect readings or triggers an open-circuit fault code. |
| 4.0 | Valves & Consumables | ||||
| 4.1 | Electronic Heater Control Valve Assembly | 712W61967-0003 (or equivalent) | 1 | Pcs | High-Failure Part: If hot air still blows out when AC is on during summer, this valve is typically jammed open. |
| 4.2 | Cabin Air Filter (External Element) | 712W61942-1304 (SITRAK C7H MAX) | 1 | Pcs | Mandatory Replacement: Routine maintenance part. A clogged filter severely reduces airflow and cooling efficiency. |
| 4.3 | Recirculation Cabin Air Filter (Internal) | WG1664130012 (or equivalent) | 1 | Pcs | Mandatory Replacement: Filters in-cabin dust. Strongly recommended to replace during a major HVAC overhaul. |
| 5.0 | Electrical & Protection | ||||
| 5.1 | High-Power HVAC/Blower Relay (24V) | WG9716580025 (or equivalent) | 2 | Pcs | Mandatory Spare: Relays in the main fuse box are prone to contact arcing and burnouts under heavy load. |
| 5.2 | Main Dashboard Blade Fuses (10A/15A/20A) | SINOTRUK Standard Mini Blade Fuses | 1 | Box | Mandatory Spare: The primary item to inspect/replace if the control panel suddenly loses power or short-circuits. |
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