Rheem R802VA07542117MSA Error Code *A227_F: Internal Fault: Gas Valve 2 Relay Welded Shut (Two-Stage Only)
What Does Code *A227_F Mean?
Your R802VA07542117MSA is a two-stage furnace, so the Bluetooth Communicating IFC (Integrated Furnace Control) carries two separate gas-valve relays: gas valve 1 controls the low heating stage and gas valve 2 controls the high stage. Each relay energizes its gas valve on demand and must also de-energize it when that heat is no longer wanted. Code A227_F is a two-stage-only fault, logged when the relay for gas valve 2 has welded shut, meaning its contacts have fused in the closed, energized position and the board can no longer command the high-stage valve off. Single-stage furnaces do not have this second relay and never report this code.
A227_F is the exact high-stage counterpart of A225_F, which is the same welded-shut failure on the low-stage relay (gas valve 1). In manufacturer terms, "welded shut" means the contacts are stuck closed and the circuit stays energized, the opposite of the "stuck open" condition in code A228_F, where the high-stage relay cannot energize its valve at all. So A227_F and A228_F are opposite failure modes of the same high-stage relay, mirroring how A225_F and A226_F relate on the low-stage relay.
The safety concern is the same as with A225_F: a relay that will not open defeats the furnace's ability to stop gas flow on command. A high-stage valve that stays energized when it should be off can show up through the flame-present safety codes A014_F, A116_F, and A127_F, which report flame detected with the gas valve commanded off, and it relates to the general internal-fault lockout A093_F.
Because a fused relay cannot be repaired in place and involves gas control, remove the furnace's ability to keep gas energized: turn off the manual gas shutoff valve at the furnace and cut electrical power to the unit, then have an HVAC technician replace the control board. If you ever smell gas, leave the home immediately and call your gas company from outside.
What You'll Notice
- You may notice the furnace continues to produce heat or the burners stay lit after the thermostat is satisfied
- A gas smell near the furnace is possible if the high-stage valve stays energized when it should be off
- The alphanumeric LED blinks "A227_F" one digit at a time with a roughly three-second pause between digits
- The furnace shows an internal fault and does not behave normally in response to the thermostat
- The board may also log a flame-present-with-valve-off safety code alongside this fault
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Gas valve 2 relay contacts welded due to electrical arcing | Most common | ✗ Call a pro → |
| Control board component failure | Common | ✗ Call a pro → |
How This Is Diagnosed
Before any diagnosis, the safe immediate action is to shut off the manual gas valve and power to the furnace, because a welded-shut valve-2 relay means the board cannot be trusted to stop high-stage gas on its own. A technician then reads the exact fault through the Bluetooth contractor app and confirms it is the gas-valve-2 (high-stage) relay, distinguishing the welded-shut A227_F from the stuck-open A228_F and from the low-stage relay codes A225_F and A226_F.
Under controlled conditions the technician verifies whether the valve-2 circuit stays energized when the board commands it off, which is the signature of a welded relay, and checks whether related flame-present codes such as A014_F or A127_F were also logged. Because the welded contacts are inside the board and cannot be serviced individually, a confirmed A227_F leads to control board replacement, after which the correct model data is reprogrammed through the Bluetooth contractor app.
When to Call a Professional
This code involves components that are not homeowner-serviceable, so have a licensed HVAC technician diagnose and repair it. Keep in mind:
- The furnace keeps producing heat or the burners stay lit after the thermostat call ends
- The board logs A227_F together with a flame-present-with-valve-off code such as A014_F or A127_F
- The A227_F fault remains after power has been cycled
- The furnace was left running and you are unsure whether the high-stage gas valve is truly shut
- You smell gas at any point, in which case leave the home immediately and call your gas company from outside
Frequently Asked Questions
Why is A227_F only on two-stage furnaces?
A227_F reports a welded-shut relay on gas valve 2, which is the high-stage gas valve. Only two-stage models like this one have a second gas valve and its relay, so single-stage furnaces never produce this code. The low-stage equivalent is A225_F.
Is it safe to keep running the furnace until a technician arrives?
No. Because the high-stage gas valve can stay energized when it should be off, turn off the manual gas shutoff valve and cut power to the furnace. If you smell gas, leave the home immediately and call your gas company from outside.
What is the difference between A227_F and A228_F?
Both involve the high-stage relay for gas valve 2. A227_F means the relay is welded shut and cannot turn the valve off, which is a safety concern, while A228_F means the relay is stuck open and cannot energize the valve, so the furnace loses full high-stage capacity.
Can the welded relay be replaced without a new board?
The relay is integrated into the control board and is not serviced separately. A confirmed welded-shut valve-2 relay means the control board is replaced, then reprogrammed with the correct model data through the Bluetooth contractor app.
✓ Verified against manufacturer service manual — March 2026