Same-day shipping on orders before 3PM CST · 10,893 OEM Parts In Stock · Carrier · Bryant · ICP · Heil · Tempstar
Track Order | 1-800-NHP-HVAC | Trade Accounts

Menu

Home Shop All Account Cart
MEDIUM URGENCY

York 6 Red Flashes — Locked Out on Pressure Switch Error

6 red flashes

Pressure switch lockout after persistent errors.

Brand: York (Also covers Coleman, Luxaire)  |  Equipment: Gas Furnace

What This Code Means

6 red flashes means the control has seen repeated pressure switch errors and entered lockout.

Likely Causes (Ranked)

Common

Persistent vent blockage

What: Ongoing exhaust obstruction.

How to check: Inspect outlet.

Fix: Clear blockage.

Shop parts
Common

Failed inducer

What: Inconsistent draft.

How to check: Listen and feel.

Fix: Replace.

Shop parts
Common

Bad pressure switch

What: Intermittent failure.

How to check: Tech test.

Fix: Replace.

Shop parts

Diagnostic Steps

  1. Cut power 60s to clear lockout
  2. Inspect exhaust
  3. Check inducer
  4. Replace switch

Frequently Asked Questions

Difference between York 3 and 6?
Both are pressure switch issues; 6 is locked out after repeated 3 errors.
Same on Coleman?
Yes.
DIY?
Vent clearing yes.

Related York Codes

York Error Code 3 Red FlashesYork Error Code 2 Red Flashes

Related Symptoms

Furnace Not Igniting

Need More Help?

Try our interactive symptom diagnostic tool or browse York parts.

Home Shop Search Account Cart