e2
Moderate
York · HVAC Systems (AC, Furnaces, Heat Pumps & Thermostats)
System Low Pressure Fault
Quick Answer
Error code E2 on your York HVAC Systems (AC, Furnaces, Heat Pumps & Thermostats) means: System Low Pressure Fault. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Check the evaporator coil for ice; if frozen, thaw by running fan-only mode
2
Inspect the air filter and replace if dirty
3
Look for oil stains at refrigerant fittings and connections indicating leaks
4
Connect gauges and measure suction and discharge pressures
5
A licensed HVAC technician with EPA Section 608 certification must perform leak detection and refrigerant 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)
Low-pressure switch
TXV valve or piston
Leak repair materials (brazing rods, nitrogen)
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