Rheem HVAC Error Code 33: How to Fix It

Q: What causes Rheem error code 33 to appear?

Error code 33 is triggered when the rollout switch opens due to excessive heat buildup, usually caused by a cracked heat exchanger, blocked venting, or restricted airflow that causes dangerous overheating conditions.

Q: Is it safe to reset the rollout switch on my Rheem furnace?

Only reset the rollout switch after thoroughly inspecting for heat exchanger cracks and vent blockages. If the switch trips repeatedly, stop using the furnace and call a professional as this indicates a dangerous condition.

Q: How much does it cost to fix Rheem error code 33?

Costs vary widely depending on the root cause. A simple rollout switch replacement costs $50-150, but if a cracked heat exchanger is the issue, repairs can range from $1,500-4,000 or may require full furnace replacement.

Q: Can I continue using my Rheem furnace with error code 33?

No, never operate your furnace with error code 33. This safety code indicates potential gas leaks or carbon monoxide risks. Turn off the system immediately and have it professionally inspected before use.

Q: How do I prevent Rheem error code 33 from happening again?

Prevent future occurrences by scheduling annual furnace maintenance, replacing air filters regularly, keeping vents clear of obstructions, and ensuring proper airflow around the unit. Professional inspections can catch problems early.

Abstract

Rheem HVAC error code 33 indicates the rollout switch has opened due to overheating, which can signal a cracked heat exchanger or blocked vent. This is a critical safety issue that requires immediate attention to prevent dangerous gas leaks or carbon monoxide exposure.