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Thermo King  |  SKU: 78-1198

78-1198 | Genuine Thermo King® 4 Speed 24V Evaporator Blower

$32900
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Description:
An Evaporator Blower 78-1198 (also called a blower fan or HVAC blower motor) is the component in a vehicle or HVAC system that pushes air across the evaporator coil so cooled air can be delivered into the cabin.

Part Number: 78-1198, 781198
Condition: New
Manufacture/Brand: Thermo King

Fits 78-1198 For
Thermo King HVAC Unit:
AP-II W 1012, AP-II X 1012, APII-X 1000, ART1-1000, ART1-1004, ART2-1000, ART2-1004, ASR-140, ASR-160, ATHENIA AP-L, ATHENIA AP-X, ATHENIA H TP, ATHENIA MK-II S960 SPLIT, ATHENIA S1100 N/W 1000, 1004, ATHENIA S1100 SG, ATHENIA S1300 N/W 1000, ATHENIA S1300 N/W 1004, ATHENIA S500 N/W 1000, ATHENIA S500 N/W 1004, ATHENIA S700 N/W 1000, 1004, ATHENIA S700 Split, ATHENIA S800 Split, ATHENIA S805 Chorus, ATHENIA S805 Split, ATHENIA S850 N-1000, ATHENIA S850 N-1004, ATHENIA S850 N 1004 NOGE, ATHENIA S850 W-1000, ATHENIA S850 W-1004, ATHENIA S950 N/W 1000, 1004, ATHENIA S950 Split, ATHENIA-S1000 N1000, ATHENIA-S1000 N1004, ATHENIA-S1000 W1000, ATHENIA-S1000 W1004, ATHENIA-S500 N1004 voor Jonckheere, ATHENIA-S800 N voor Jonckheere, ATHENIA-S800 N1000, ATHENIA-S800 N1004, ATHENIA-S800 W1000, ATHENIA-S800 W1004, ATHENIA-S950 N voor Jonckheere, ATHENIA-S950 N1004 voor COSTA, ATHENIA-S960 N1000, ATHENIA-S960 N1004, ATHENIA-S960 W1000, ATHENIA-S960 W1004, Bus AC & Heating Components, Citi-RT & Citi-RT N 1012, Citi-RT 1000, Citi-RT 1004, Citi-RT N R134a, Citi-RT N R407C, Citi-RT Split, Coach RT 1000 (System 920107), Coach RT 1000 (System 920289), Coach RT 1012, Coach RT for Optima, DEH2 M1 & M2, HRT-1000, HRT-1004, HRT-1012, KRS, KRT 1000, SR-70 1000/1004, SR-700, SRT-III, X-1000 AP, X-1800 AP, X-900 AP
Konvecta HVAC Unit:
LRTHP-1004 M7 11M, LRTHP-11M, LRTHP-11M (900378), LRTHP-5M (900506), LRTHP-7.5M, LRTHP-7.5M (900482), LRTHP-M10 1000, LRTHP-M2, LRTHP-M4 7.5M, LRTHP-M6 1000, LRTI-1000 (System 918349), LRTI-1001 (System 918502), LRTI-1001 (System 918892), LRTI-1004 (System 918891), LRTI-1004 (System 918894), LRTIII-W Split 1000, LRTIII-W Split 1004, LRTSP-(System 920280), LRTSP-5M (900386), LRTSP-M5 1004, MRT HEAT, MRT-1000, MRT-1004, MRTH M1, MRT-I, MRT-I 1001, MRT-I 1004/TM21, MRT-II, MRT-III N 1004 KAROSA, MRT-III Split, R6-M1, R6-M3

Purpose of using 78-1198:

1. Pushes Air Across the Evaporator Coil

The blower forces air over the cold evaporator coil so the air becomes cooled before entering the cabin.

2. Distributes Air Through Vents

It sends cooled or heated air through:

  • Dash vents

  • Floor vents

  • Defrost vents

Ensuring even and controlled airflow.

3. Maintains Cabin Comfort

The blower allows the driver to adjust:

  • Fan speed

  • Temperature

  • Airflow direction

Providing comfort in both hot and cold weather.

4. Supports Defrosting and Defogging

Strong airflow helps clear:

  • Foggy windows

  • Condensation

  • Frost

Improving visibility and safety.

5. Enables Proper A/C System Function

The evaporator can only cool air if air is moving across it—so the blower is essential for:

  • Cooling performance

  • Preventing coil freeze-up

  • Maintaining airflow pressure

 

Signs of a Bad Evaporator Blower 78-1198:

1. Weak or No Airflow from Vents

  • Air is barely moving even at high fan speeds

  • No air comes out of the vents
    Often caused by a failed blower motor or broken fan blades.

2. Unusual Noises

  • Squealing, grinding, or rattling sounds

  • Clicking or buzzing
    These can indicate:

  • Worn bearings

  • Debris stuck in the blower

  • Damaged fan blades

3. Inconsistent Airflow

  • Air comes and goes intermittently

  • Only works at certain speeds
    Could be due to:

  • Faulty blower motor resistor

  • Loose electrical connections

  • Motor winding issues

4. Blower Works Only on Certain Speeds

  • Fan works at high speed but not low or medium

  • Usually caused by a blown resistor or damaged control module

5. Burning Smell or Smoke

  • Smell of burning plastic or electrical insulation

  • Can indicate motor overheating or short circuits

6. HVAC System Doesn’t Cool or Heat Properly

  • Even if the A/C or heater is working, air won’t flow

  • The evaporator coil may not get enough airflow

7. Visible Damage

  • Fan blades cracked or broken

  • Accumulated debris blocking airflow

 

About the Manufacturer – Thermo King:

Thermo King is a global leader in transport temperature control systems, specializing in refrigeration units for trucks, trailers, buses, rail cars, and shipping containers. Founded in 1938, the brand is renowned for reliable, efficient, and innovative solutions that keep perishable goods at precise temperatures during transport, supporting industries like food, pharmaceuticals, and logistics worldwide.

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