Universal Silicon Carbide Integrated Ignition Control

This controller was perfect for replacing my older controller. Came with extension wires to extend current wires to new location. Fast delivery

Problem Solved: model 50A50-474 Recurring 5-Flash Error Code (Flame sensed with gas valve off) and blower running continuously on lockout after reaching set point during a longer heating cycle. My Trane XE90 furnace was repeatedly going into a safety lockout displaying this error code after heating stopped and the gas valve closed, after which the indoor blower fan would run continuously for approximately twenty to thirty minutes before timing out and shutting off on its own. Notably, the fault occurred only after longer heating cycles and did not trigger during shorter test runs while troubleshooting. The root cause was an internal failure on the old control board, model 50A50-474, specifically within its flame sensing and rectification logic circuit, likely due to thermal expansion of the board causing microfractured solder joints to separate and incorrectly detect ghost flame signals while the gas valve was off following a long heating cycle. Replacing the control board resolved the issue immediately. While it used the same spade size and Molex connectors, the wire locations on the new board were different, and I used the supplied jumper wire for the 12-pin Molex connector required for Trane systems. Because of the new mounting position, I also needed to use wire extensions, though that was strictly a matter of physical placement rather than function. As a routine maintenance precaution, I installed the new flame sensor even though it wasn't strictly needed. Moving all the wires over to the new board worked immediately upon power-up. No error codes for flame detected after gas valve shut off, and the furnace now ignites smoothly, maintains normal heating cycles, and shuts down safely with zero fault codes. If your Trane furnace 50A50-474 board gives a 5-flash code after a long run, do not overlook the control board. A fresh board fixed the issue completely and restored normal operation.

Worked like it should and it shipped fast!

I've ordered lots of parts through supply house normally w no issues. This board stop working after about 6 months and I contacted customer service. They expedited my replacement board. It was at my door in under 24 hrs from it being shipped.. excellent customer service

Ordered two parts. First one was the wrong part. They took it back and sent me the correct part.

My outdated control board failed on the fan control relay due to burned out relay switch. This was the listed replacement option. I was a little concerned because the board was not an exact match but all indications showed that this was the upgraded replacement so I took a chance. All the connections were the same but some were in different locations on the board. Very easy upgrade and swap.

Perfect solution to a customers furnace issue.

Repaired my sister in laws furnace. Customer service was outstanding

Last two ordered were DOA in the 24v side. 24v not present at R terminal when power is applied.

Fast shipping furnace was back working in 2 day