MEDIUM URGENCY

Rheem Code 58 - Condensate Drain Problem

Code 58

Condensate drain problem - water buildup in high-efficiency furnace.

Brand: Rheem (Also covers Ruud) | Equipment: Gas Furnace

What This Code Means

Code 58 on Rheem (Ruud) high-efficiency furnaces means condensate is not draining properly. Water accumulation in the condensate trap or drain can cause backpressure and operation problems.

Likely Causes (Ranked)

Most common

Plugged condensate trap

What: Algae or sediment blocks the trap.

How to check: Inspect condensate trap.

Fix: Clean trap; flush with water.

Common

Blocked drain line

What: Drain hose to floor drain plugged.

How to check: Trace drain line and check for blockage.

Fix: Clear line or replace hose.

Seasonal

Frozen drain (winter)

What: Drain hose runs through cold space and freezes.

How to check: Feel hose for ice.

Fix: Thaw and reroute or insulate hose.

Diagnostic Steps

Cut power
Inspect condensate trap for buildup
Clear trap
Flush drain line
Verify drain flows freely

Frequently Asked Questions

DIY fix?

Yes - condensate trap cleaning is straightforward maintenance.

How often to clean condensate trap?

Annually before heating season as part of routine maintenance.

Same on Ruud?

Yes.

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Need More Help?

Try our interactive symptom diagnostic tool or browse Rheem parts.

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