Raypak Error Vent Pressure Fault: Blocked Vent
The vent pressure switch detected a blocked or restricted vent and the unit shut down to prevent unsafe venting. The primary cause is an obstructed/sagging/restricted vent line. A separate related Raypak message ('Cond Drain Blocked / Vent Temp Limit Err') covers blocked condensate drain or excessive flue/PVC vent temperature, so check the vent first, then the condensate drain and flue temperature. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
The vent pressure switch detected a blocked or restricted vent and the unit shut down to prevent unsafe venting. The primary cause is an obstructed/sagging/restricted vent line. A separate related Raypak message ('Cond Drain Blocked / Vent Temp Limit Err') covers blocked condensate drain or excessive flue/PVC vent temperature, so check the vent first, then the condensate drain and flue temperature.
Raypak fault codes can vary by model and series. Use this as a guide — the same code can have more than one cause. Our Technical Safety BC–licensed technicians read the code, confirm it against your unit's manual, and diagnose the true cause before any repair.
Likely causes of Raypak error Vent Pressure Fault
- Blocked, sagging, or restricted vent piping
- Blocked condensate drain backing up
- Excessive flue temperature for PVC venting
- Failed flue/vent temperature sensor or vent pressure switch
- Improper vent installation
What you can safely check
- Check the outdoor vent terminal for snow, leaves, ice, or nests blocking it
- Look for any obvious water backup near the boiler's condensate drain
Beyond these checks, do not open the unit or touch gas/electrical parts — BC law requires a licensed gas fitter. Call us for a proper diagnosis.
Error Vent Pressure Fault usually leaves you without heat or hot water and can indicate a safety-related fault. Don't keep resetting it — call for priority after-hours Raypak repair.
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Parts often behind Raypak error Vent Pressure Fault
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Raypak Error Vent Pressure Fault Repair Across Metro Vancouver
Related Raypak Venting & Combustion Codes
Frequently Asked Questions
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