Lennox MWHA009S4, Service Manual

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Top Cover
Step 4. Remove the screws from the front panel and then
remove panel.
Front Panel
Step 5.
Remove the screw securing the service valves
cover and then remove.
Service Valves
Cover
Step 6. Remove the screws securing the right panel
cover and remove panel.
Front Cover
17.2.3. Electronic Components (MWHA009S4 and
MWHA012S4)
NOTE:
Antistatic gloves must be worn when you
dissemble the electronic box.
NOTE:
Remove the panel plate before disassembly the
fan.
Step 1. Remove the connector for the compressor.
Step 2. Pull out the two blue wires connected to the
expansion value (not applicable to AC units only)
Step 3. Pull out connectors for the condenser coil
temperature sensor (T3), outdoor ambient
temperature sensor (T4) and discharge
temperature sensor (TP).
Step 4. Disconnect the expansion valve.
Step 5. Remove electronic control box.
Compressor
T3, T4 and TP
EEV
Fan Motor
4-way valve (HP only)