PREVOST H3-41 - Evaporator, Rear Electrical, and Entrance Door

COACH EXTERIOR
Accessories air filter
Accessories fill valve
Accessories air tank
purge valve
FRONT SERVICE COMPARTMENT 12130
EVAPORATOR COMPARTMENT
Pull the release latch located on the left side wall
of the rearmost baggage bay.
Release latch
HVAC COMPARTMENT ACCESS 18306
EVAPORATOR COMPARTMENT 22169
The HVAC (Heating, Ventilating and Air-
Conditioning) compartment contains the
following components:
 Relay R39 – Condenser fan motor;
 Relay R40 – Condenser speed control HI;
 Relay R41 – Condenser speed control HI;
 RS36 – Current limit for relay;
 RS37 – Current limit for relay.
Relays and resistors are marked for easy
servicing.
Note: It is important to keep the HVAC
compartment door closed while checking the
system to prevent faulty readings.
REAR ELECTRICAL COMPARTMENT
This compartment door must be opened using
the exterior compartment key. The light in the
compartment turns ON automatically when the
door is opened.
The rear service compartment contains the rear
junction panel and the following components:
• ECU (Electronic Control Unit) for Allison
World Transmission;
• Secondary circuit breakers;
• Relays;
• Programmable speed switch (Manual or
Eaton Transmission only);
• A/C module;
• A/C logic panel (W973B module);
• Relay R34 – A/C logic panel;
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