T: +8615609213525
E: 15829336298@139.com
E: 15829336298@139.com
Room 1212-G107, Unit 2, Building 1, Block A, Shenglong Plaza, No. 80 Weiyang Road, Weiyang District, Xi'an City, Shaanxi Province
| Quantity: | |
|---|---|
811-61900-7297
Sinotruk HOWO
| Attribute | Specification |
|---|---|
| Part Name | Heater Unit Assembly / Warm Air Heater Core / Cab Heater System |
| Common Names | Truck Cabin Heater, Engine-Cooled Heater, Hot Water Heater Core |
| Type | Liquid-to-air heat exchanger (radiator-based) with integrated blower motor |
| Heat Source | Engine coolant (from diesel engine cooling system) |
| Working Principle | Circulates hot engine coolant through a small radiator core; electric blower forces air across fins to produce warm airflow |
| Blower Motor Voltage | 24V DC (standard for Chinese/European heavy trucks) |
| Blower Speeds | Typically 3–5 speed settings (controlled by dash switch or rheostat) |
| Airflow Rate | 250 – 400 m³/h (depending on motor power and duct design) |
| Core Material | Aluminum or copper-aluminum finned tube heat exchanger |
| Housing Material | Flame-retardant ABS plastic or sheet metal casing |
| Inlet/Outlet Connections | Rubber hoses with clamps (usually 16mm or 18mm ID) connected to engine cooling system |
| Drain Valve | Integrated (for winterization and maintenance) |
| Thermostat Option | Some models include an inline thermostat or temperature control valve |
| Mounting Location | Under dashboard inside cab or mounted on firewall |
| Weight | Approx. 3.0 kg – 6.0 kg (varies by size and configuration) |
| Operating Temperature Range | Coolant up to 95°C; delivers air output of 40–75°C |
| Compliance Standards | GB/T, ISO 14227, ECE R122 (vehicle heating system safety) |
Name1
Name2
Proper installation ensures optimal performance and prevents leaks or electrical faults.
Engine Off & Cooled Down: Wait until coolant temperature <50°C to avoid scalding.
Drain Cooling System (Optional): If replacing core, drain coolant from engine block or heater line.
Inspect Hoses & Clamps: Replace cracked or swollen rubber hoses.
Check Blower Motor: Test for continuity and rotation before installation.
Remove old heater unit by disconnecting:
Two coolant lines (inlet/outlet)
Electrical connector (blower motor)
Mounting screws or brackets
Install new heater core assembly securely in original location.
Connect inlet/outlet hoses using new worm-drive or spring clamps — tighten properly.
Plug in blower motor wiring harness — ensure secure connection.
Refill coolant system and bleed air (open bleed valve if available).
Start engine and run heater at max setting to check:
Heat output
No coolant leaks
Blower speeds functioning normally
❗ Critical Tip: Avoid kinking or twisting coolant hoses — restricts flow and reduces heating efficiency.
| Attribute | Specification |
|---|---|
| Part Name | Heater Unit Assembly / Warm Air Heater Core / Cab Heater System |
| Common Names | Truck Cabin Heater, Engine-Cooled Heater, Hot Water Heater Core |
| Type | Liquid-to-air heat exchanger (radiator-based) with integrated blower motor |
| Heat Source | Engine coolant (from diesel engine cooling system) |
| Working Principle | Circulates hot engine coolant through a small radiator core; electric blower forces air across fins to produce warm airflow |
| Blower Motor Voltage | 24V DC (standard for Chinese/European heavy trucks) |
| Blower Speeds | Typically 3–5 speed settings (controlled by dash switch or rheostat) |
| Airflow Rate | 250 – 400 m³/h (depending on motor power and duct design) |
| Core Material | Aluminum or copper-aluminum finned tube heat exchanger |
| Housing Material | Flame-retardant ABS plastic or sheet metal casing |
| Inlet/Outlet Connections | Rubber hoses with clamps (usually 16mm or 18mm ID) connected to engine cooling system |
| Drain Valve | Integrated (for winterization and maintenance) |
| Thermostat Option | Some models include an inline thermostat or temperature control valve |
| Mounting Location | Under dashboard inside cab or mounted on firewall |
| Weight | Approx. 3.0 kg – 6.0 kg (varies by size and configuration) |
| Operating Temperature Range | Coolant up to 95°C; delivers air output of 40–75°C |
| Compliance Standards | GB/T, ISO 14227, ECE R122 (vehicle heating system safety) |
Name1
Name2
Proper installation ensures optimal performance and prevents leaks or electrical faults.
Engine Off & Cooled Down: Wait until coolant temperature <50°C to avoid scalding.
Drain Cooling System (Optional): If replacing core, drain coolant from engine block or heater line.
Inspect Hoses & Clamps: Replace cracked or swollen rubber hoses.
Check Blower Motor: Test for continuity and rotation before installation.
Remove old heater unit by disconnecting:
Two coolant lines (inlet/outlet)
Electrical connector (blower motor)
Mounting screws or brackets
Install new heater core assembly securely in original location.
Connect inlet/outlet hoses using new worm-drive or spring clamps — tighten properly.
Plug in blower motor wiring harness — ensure secure connection.
Refill coolant system and bleed air (open bleed valve if available).
Start engine and run heater at max setting to check:
Heat output
No coolant leaks
Blower speeds functioning normally
❗ Critical Tip: Avoid kinking or twisting coolant hoses — restricts flow and reduces heating efficiency.
