👋 Hey, it’s Jake! Let’s Talk Furnace Error Codes 👊
What’s up, friends? 👋 It’s your favorite HVAC guy, Jake Lawson, and today we’re tackling a topic every installer and homeowner eventually faces: those dreaded error codes on your R‑32 gas furnace.
Trust me, I’ve been called out in the middle of a snowstorm more times than I can count because someone’s furnace started blinking like a disco party. But the thing about error codes? They’re NOT as scary as they seem. They’re a roadmap to fixing the problem.
So, if you’re tired of guessing or calling in expensive service pros for every flash of that LED light, stick with me. In this guide, I’ll cover the top ten error codes you’re most likely to run into with R‑32 gas furnaces—and walk you through how to fix or clear them like a pro. Let’s go! 👇
⚡️ What’s an R‑32 Gas Furnace, Anyway?
If you’re new to the R‑32 scene, here’s the lowdown: R‑32 is a next‑gen A2L refrigerant making its way into residential gas furnaces and air conditioning units. Compared to old R‑410A, R‑32 is better for the environment, operates at higher efficiency, and has lower global warming potential (GWP).
👉 Curious about R‑32? The EPA SNAP Regulations page is a great resource for understanding why this refrigerant is gaining traction.
⚡️ Common R‑32 Gas Furnace Error Codes You Need to Know
Alright, here are the ten error codes you’re most likely to run into and, more importantly, how to fix them. Let’s unpack this:
1️⃣ Error Code 1: Pressure Switch Failure
What It Means: The pressure switch didn’t close within the allotted time, indicating a venting or inducer problem.
✅ Jake’s Fix:
– Check that the inducer motor is running.
– Ensure intake/exhaust lines aren’t blocked (leaves, ice, bird nests).
– Use a manometer to verify pressure.
– Replace the switch if it doesn’t operate reliably.
2️⃣ Error Code 2: Ignition Failure
What It Means: Furnace tried to ignite three times but failed.
✅ Jake’s Fix:
– Check gas supply and pressure.
– Inspect the igniter for cracks.
– Confirm flame sensor is clean and positioned correctly.
– Test gas valve and igniter connections.
More on ignition systems from Downtown Air.
3️⃣ Error Code 3: Limit Switch Open
What It Means: Furnace is overheating due to low airflow.
✅ Jake’s Fix:
– Check for clogged air filters.
– Ensure registers and returns aren’t blocked.
– Verify blower motor operation.
– Test the limit switch and replace if needed.
For more on limit switches, the ACCA standards site is a great resource.
4️⃣ Error Code 4: Flame Failure
What It Means: The flame sensor didn’t confirm flame presence, shutting down the burners.
✅ Jake’s Fix:
– Clean the flame sensor (steel wool works well).
– Ensure the sensor is in the flame path.
– Check gas pressure and supply.
– Replace sensor if necessary.
More about flame sensors and their role can be found at Liberty Supply.
5️⃣ Error Code 5: Rollout Switch Tripped
What It Means: Flame or combustion gases have leaked from the burners.
✅ Jake’s Fix:
– Shut down the furnace immediately.
– Check for blocked or disconnected venting.
– Inspect burners and heat exchanger for cracks.
– Never bypass this switch; replace it if needed.
6️⃣ Error Code 6: Low Gas Pressure
What It Means: The gas valve didn’t open due to low supply pressure.
✅ Jake’s Fix:
– Confirm gas supply and line pressure.
– Check gas valve connections and integrity.
– Consult the manufacturer’s specifications for required pressure.
More gas pressure guidelines available from the AHRI site.
7️⃣ Error Code 7: High Gas Pressure
What It Means: Gas pressure exceeded the unit’s design limits.
✅ Jake’s Fix:
– Check gas valve pressure settings.
– Install a pressure regulator if needed.
– Confirm combustion settings using a combustion analyzer.
8️⃣ Error Code 8: Control Board Failure
What It Means: Internal electronics aren’t responding correctly.
✅ Jake’s Fix:
– Confirm all connections are secure.
– Check for blown fuses or scorch marks.
– Replace the control board if necessary.
If you’re in the market for a replacement, The Furnace Outlet can help locate the right part.
9️⃣ Error Code 9: Motor Failure
What It Means: The blower or inducer motor failed to operate within specifications.
✅ Jake’s Fix:
– Check the capacitor and replace if necessary.
– Measure motor winding resistance.
– Confirm motor receives voltage and spins freely.
More about motor diagnostics available at HVAC Know It All.
🔟 Error Code 10: A2L Refrigerant Sensor Trip
What It Means: A2L sensor detected a potential refrigerant leak.
✅ Jake’s Fix:
– Use an A2L‑rated leak detector like the Fieldpiece DR58.
– Check connections and coils for leaks.
– If confirmed, recover and recharge per manufacturer specs.
⚡️ Final Advice from Jake: Stay Calm, Stay Methodical
Error codes aren’t the enemy — they’re just telling you where to look. The key to tackling R‑32 gas furnace error codes is knowing how to interpret them and having the right tools on hand.
Remember:
✅ Always kill the power before working inside the furnace.
✅ Never bypass safety switches.
✅ If you’re in doubt, call a licensed pro.
👊 That’s a Wrap, My Friends!
If you’ve made it this far, you’re one step closer to being an R‑32 gas furnace expert—or at least confident enough to walk down into the basement without breaking a sweat.
Error codes can be intimidating, but with the right approach and tools, you can handle almost any issue that pops up. Stay safe, stay sharp, and remember — when in doubt, slow down, read the manual, and use the right tool for the job.
If you’re looking for more R‑32 gas furnace tips, or if you just want to browse a solid selection of units and replacement parts, head over to The Furnace Outlet. They’ve got the goods and the know‑how to match.
Trying to figure out what size gas furnace you need? Visit: Sizing Matters: How to Match Your R‑32 Gas Furnace to Your Home’s BTU Needs.
Until next time — this is Jake Lawson, signing off. Stay warm, stay safe, and as always… you’ve got this! 🔥👊
- Jake, your HVAC guide
