Heating and A/C Unit, Assembly

Heating And A/C Unit, Assembly







NOTE:
- Before carrying out any work on the A/C refrigerant system, refer to all CAUTIONS and WARNINGS in A/C refrigerant system safety measures.
- Service refrigerant system using Kent More ACR 4 or equivalent
- During servicing, all couplings, fittings and related fasteners must be torqued to specifications.

Removing

Assembly
1. Heater core
- Removing and installing, see Fig. 1.
- Always use new coolant after replacement.
2. Housing, upper part
3. Evaporator
- Attaching inlet/outlet seal, see Fig. 2
- Installing seal, see Fig. 3
4. Housing, lower part
- With fresh/recirculating air flap
- With central air flap







Fig. 1 Heater core, removing and installing

Removing
- Remove heating and A/C unit.
- Remove screws -1 -.
- Pull heater core up and out from housing -arrow-

CAUTION: In order to prevent damage to heater core, lift heater core only from areas indicated in gray.

Installing
- Install in reverse order of removal, noting the following:

NOTE:
- Inspect all heating and A/C unit housing seals for damage and replace if necessary before installation. Evaporator inlet/outlet seal, see Fig. 2. Evaporator seal, see Fig. 3.
- Ensure all electrical harness tie straps are replaced and installed in their original locations.
- Replace both evaporator inlet/outlet O-rings.
- Ensure refrigerant pipes are reinstalled stress free.
- Ensure evaporator water drain and drain valve are installed and function properly, see Fig. 1.
- Evacuate and recharge refrigerant system.
- Perform leak test.
- Always use new coolant after replacement.







Fig. 2 Evaporator inlet/outlet seal, attaching
- Evaporator inlet -B- and outlet -A- pipes must be insulated between the halves of the housing with seal -C-







Fig. 3 Evaporator seal, installing
- Foam seal -B- must must be glued around circumference of evaporator -A-.
- To allow evaporator water to drain, do not attach foam seal on evaporator in area -C-