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airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8164
Experience:  Furnace, A/C and heat pump specialist.
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I keep getting the E228 code. Model SLP98UH090XV36C,

Customer Question

I keep getting the E228 code. Model SLP98UH090XV36C, Ser#5912H22839. Following a call for heat from thermostat, system goes through initial sequencing followed by the ramp up of fan until shutting down and displaying E228 code. Have shut off power, waited, then restarted several times. System installed +- 3 years ago and no problems. Filter is clear.
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

The 228 error is a pressure switch calibration issue. Check to make sure there are no blockages in intake or exhaust vent and make sure all wires are connected to switch. I have seen anything from snow to a spider web create enough blockage to prevent switch from closing. Also make sure drain is clear and no water standing in hoses to or form inducer and switches.

Customer: replied 1 year ago.
Checked intake and exhaust vents are clear. No build up of water and drain is clear.
Customer: replied 1 year ago.
What else can I check?
Expert:  airheatman replied 1 year ago.

If no blockage,I would suggest checking the vacuum on switch, but will require a vacuum tester to do so. May be best to call in a tech rather than just start replacing switches, as they will have meters and also may be able to repair under warranty

Customer: replied 1 year ago.
Is there a temp work around to get the heater going while I can schedule a service tech. I'm concerned about going another night without heat.
Expert:  airheatman replied 1 year ago.

I never recommend bypassing a switch as there could be a more serious issue causing the switch to open such as a defective heat exchanger or venting issue.