Mitsubishi Heavy Industries Error Code E43
Low pressure protection
Error Code Summary
| Brand | Mitsubishi Heavy Industries |
| Error Code | E43 |
| Meaning | Low pressure protection |
| Cause | Low pressure switch activated |
| Recommended Action | Check refrigerant charge, filter, expansion valve |
How to Fix Mitsubishi Heavy Industries Error E43
- 1
Power Cycle the Unit
Turn off the unit at the breaker, wait 5 minutes, then restore power. Some errors auto-clear after a restart.
- 2
Identify the Issue
Error E43 means: Low pressure protection. The most common cause is: Low pressure switch activated.
- 3
Take Corrective Action
Check refrigerant charge, filter, expansion valve
- 4
Test the System
After completing repairs, run the system and monitor for the error code. If it recurs, the issue may require professional diagnosis.
Safety Notice
Always disconnect power before performing any electrical work. If you're not a certified HVAC technician, contact a qualified professional for repairs involving refrigerant, electrical components, or compressor work.
Frequently Asked Questions
What does Mitsubishi Heavy Industries error code E43 mean?
Mitsubishi Heavy Industries error code E43 indicates: Low pressure protection. This is typically caused by: Low pressure switch activated.
How do I fix Mitsubishi Heavy Industries error code E43?
To fix Mitsubishi Heavy Industries error code E43: Check refrigerant charge, filter, expansion valve. If the error persists after these steps, contact a qualified HVAC technician.
Is Mitsubishi Heavy Industries error code E43 serious?
Error code E43 (Low pressure protection) should be addressed promptly to prevent further damage to your Mitsubishi Heavy Industries system. Always turn off the unit if you notice unusual sounds, smells, or continued malfunction.