32
Low-heat pressure switch, draft safeguard, or auxiliary limit (downflow only) did not close or reopened
This code typically points to
- Low-fire draft issue
- Pressure-switch tubing issue
- Blocked condensate/trap
- Draft safeguard/auxiliary-limit opening on specific configurations
Next checks to confirm
- Verify which switch in the chain is actually open
- Inspect tubing/condensate path and low-fire draft
- Follow OEM draft/pressure procedure
Escalation
Repeated 32 on condensing units with correct switch operation often points to marginal draft or trap/vent issues.
Reset behavior
Retry logic varies with sequence stage; diagnose active condition.
Urgent
Fix now