e1
Moderate
Trane · HVAC Systems (AC, Furnaces & Heat Pumps)
Low Pressure Fault
Quick Answer
Error code E1 on your Trane HVAC Systems (AC, Furnaces & Heat Pumps) means: Low Pressure Fault. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Connect refrigerant gauges and check suction and discharge pressures
2
Compare operating pressures to the expected range for current outdoor temperature
3
Perform a thorough leak check on all connections, coils, and the line set
4
Inspect the metering device for proper superheat at the evaporator outlet
5
Only EPA Section 608 certified technicians may handle refrigerant recovery and charging
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Refrigerant (R-410A)
TXV valve or piston
Low-pressure switch
Leak detection equipment
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