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SINOTRUK HOWO MAX / HOWO T7H Integrated HVAC Unit Assembly YG1671821000
HVAC System Overhaul BOM (Bill of Materials) - SINOTRUK HOWO
| Item | Part Name | Core SINOTRUK Part No. (Main/Suffix) | Functional Description | Unit | Qty / Truck | Recommended Replacement Reason & Notes |
|---|---|---|---|---|---|---|
| 01 | HVAC Integrated Housing Assembly | YG1671821000 | Main outer shell and frame of the HVAC system, housing all core cooling and heating sub-components. | Set | 1 | Replace only in case of severe collision damage, cracked casing, or heavily burned brackets. |
| 02 | Cabin Air Filter | YG1671821000+005 | High-efficiency filtration of ambient dust, pollen, and debris to keep cabin air clean. | Pcs | 1 | Mandatory Replacement. High-frequency maintenance consumable; clogging severely restricts air volume. |
| 03 | HVAC Blower Assembly | YG1671821000+012 | 24V heavy-duty electric fan that drives full cabin air circulation for both heating and cooling. | Set | 1 | Critical Wear Part. Replace if the bearing squeaks, carbon brushes wear out, or it jams due to high site dust. |
| 04 | Evaporator Core Assembly | YG1671821000+008 | All-aluminum laminated heat exchanger responsible for air conditioning cooling and dehumidification. | Pcs | 1 | Core failure item. If the AC system constantly loses refrigerant with no external leaks, the evaporator is likely pinholed/cracked. |
| 05 | Heater Core Assembly | YG1671821000+007 | Directs high-temperature engine coolant into the cabin to provide heating during winter. | Pcs | 1 | Core failure item. Internal scaling blocks heat flow (no heat in winter), or corrosion causes coolant leaks on the cabin floor. |
| 06 | A/C Expansion Valve (H-Type) | YG1671821000+006 | Throttles and depressurizes the refrigerant, regulating its flow into the evaporator core. | Pcs | 1 | Highly Recommended to replace concurrently. Internal needles can jam or freeze up, causing intermittent AC cooling. |
| 07 | Blower Motor Resistor / Regulator | YG1671821000+001 | Electronic control board that regulates the blower fan speeds via resistance variation. | Pcs | 1 | When burnt out, the blower motor will either only run on maximum speed or fail to work entirely. |
| 08 | Air Door Actuator | YG1671821000+002/003/004 | 24V micro servo motors responsible for switching fresh/recirculation, hot/cold mix, and air modes. | Pcs | 3 | Replace if plastic gears wear down (stripping) or the motor burns out, causing modes to jam (e.g., cannot switch to defrost/floor). |
| 09 | Heater Control Valve (Electronic) | Matches specific HOWO truck model | Electronically cuts off or allows engine coolant flow into the heater core, preventing hot air leakage in summer. | Pcs | 1 | If the AC blows hot air during summer, this valve is typically stuck open or failing to seal tightly. |
| 10 | A/C Line O-Ring Repair Kit | Universal Green HNBR A/C O-Rings | Provides gas-tight sealing for connections at the expansion valve, evaporator, and high/low-pressure lines. | Set | 1 | Mandatory Replacement. One-time use rubber seals. Always fit new O-rings coated with polyolester (POE/PAG) oil when reconnecting lines. |
DETAILS
| DESCRIPTION | Integrated HVAC Unit Assembly | PART NUMBER | YG1671821000 |
| WEIGHT | 10kg | VOLUME | 58 cm × 45 cm × 38 cm |
| TRUCK MOLDE | SINOTRUK | QUALITY | Copy,High Copy, OEM,Original |
| MOQ | 1 | WARRANTY | 1 year |
| PAYMENT | TT/WESTEN UNION | SHIPMENT | by air/sea/railway |
| BRAND | SINOSACHS | PLACE OF ORIGIN | JINAN CITY,CHINA |
| STOCK | IN STOCK | APPLICABLE SITE | CABIN |
| PACKAGE | Carton/Woodenbox | PORT OF LANDING | Qingdao Port,China |
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