White-Rodgers 50A55-743 Control Board

Had an intermittent 4-flash "open high limit" fault message on my ~15 year old system at startup (definitely not reaching a high limit). Lots of multimeter'ing did not reveal any obvious problems on sensors, transformer, wiring, etc. The system would run for a few days normally, then fault out. Simple power cycling would not resolve the problem, but after poking around a bit, it would work again until the next fault. Found out online that the original board was prone to failures after many years in service, so gave this replacement board a try. Was very easy to install and system has been working great for over a month.Replaced another board in the same-aged second furnace which had been having random 6-flash "open rollout" faults (before startup, and even on A/C setting - there was definitely no rollout happening), and it too seems to be working fine now.Great value for the money and way better than paying someone to do this for me.

To preface, a week ago I had very little knowledge of how a furnace really worked.So it finally got cold this fall and I turned on the furnace for the first time a few days ago. Crap, no heat. After checking the furnace, I got a couple different errors.First, I was getting 3 blinks, pressure switch open error. The inducer motor would come on but the igniter would not get hot and obviously no flame. After watching a few youtube videos on how to diagnose common furnace issues I was able to get a good grasp on what to test. Testing the pressure switch was easy. All you need to do is put your voltmeter in continuity mode and place the leads on it. There should be no continuity when the inducer motor is off. Once the inducer motor comes on and causes the draft then the change in pressure will close the pressure switch and cause voltmeter to beep if it's in working order. My inducer motor was starting and closing the pressure switch reliably yet I was getting the pressure switch open error. Hence I knew most likely the board was bad.After more testing, a 2nd error I was getting was a continuous single flashing light. This time, the inducer motor would come on and the hot surface igniter would glow bright but no click of gas valve and again no flame. This rules out the igniter as a problem. It also effectively ruled out a pressure switch being the issue since the igniter would not come on without the pressure switch closing. Could it be a gas valve issue? Possibly, but from I've read they rarely fail. The way to help diagnose the gas valve is to test for voltage to the gas valve. You should get 24V to the gas valve for it to open. If the hot surface igniter comes on and you get voltage to the valve but no flame, then the valve is bad. If you don't get voltage, the board is likely bad.I had 0V to my gas valve indicating a board problem as I suspected.I ordered this board and received it two days later just as a cold front was arriving, replacing a 50A55-289 board which is no longer sold. The board layout was the exact same and it was an easy 15 minute swap. Firing up the furnace for first time was nerve wracking but after 20 seconds or so, everything fired up perfectly. I had just saved myself about $500 for a few hours of research/diagnostics/labor and a lifetime of knowledge. I'll likely pick another one for backup since they apparently fail often.

This board fit perfectly and worked instantly. I replace my obsolete 150-0812. The old board possibly to a voltage surge during an intense storm the left the city without power for about a week. The AC guy came out and gave me a few tips on what to look for in terms of how to replace the board. His price would have been close to $600 for his board and labor. And there was virtually no labor. 15 minutes for my effort. Just keep track of the wires as you replace them.Would buy again.

code was flashing 3 times (means switch board). however there was nothing wrong with switch board. Tested the computer board and found it wasnt catching power- so of course next step in system was switch board. Luckily didnt waste time to do switch board. Swapped out this (15 mins) and boom, system was up and running. I would also swap out your giniter and flame sensor, since theyre only 2 minutes of work each and typically a $5 part (sensor) and a $33 dollar part (ignitor). Even if they aren't bad, smart to use those as back up i nthe event one goes out - you'll have a used working one so the hvac companies can't charge you $500 for what costs $40 and 13 minutes, typically for those 2 extra parts. Also, when swapping out this board, dont forget to take pictures and pull out one thing out at a time, and piece it into new board. Worked perfect.

I first purchased this product in Mid 2018 and it lasted this 2023 Feb (about 4 years total). I am not sure what the life span of the product is. However, it worked perfectly well while it lasted. It was easy to install, it took approximately 20 mins to remove the old one and install the new one. I have 2 AC/Heating units in my home. The control board for the one upstairs has never been replaced/changed since I have owned the home. But, the downstairs unit is the one I just recently replaced again. If you check on youtube, there are videos for removing and installing. Or otherwise, you can just take a picture of the wiring and do the same. I gave it a 4 star, rather than a 5 star. 'Cause, I'm not so sure of the lifespan.

Works as well as more expensive ones.

The worked in my Goodman furnace. Perfect fit and works great!

Replaced failing OEM White Rodgers 50A55-289 on Goodman Single Stage Furnace. Furnace was going into soft lock out, control board solved issue. Identical physical/electrical/controls installation, furnace cycles thru stages as per design.

I was told that the controller board for my furnace had been discontinued, however, I suspect that they were more interested in selling me a new furnace. This board was a direct replacement for my old control board. This is not a repair for your average homeowner.

The product is very well priced, it is a newer model and very easy to install. Can not ask for anything better. Thank you you saved the day and my pocket.

Bought it originally to intend to replace a suspected malfunction Goodman gas furnace control board. This one is an upgraded version but fully compatible with the old one. It turns out the old one is good but it did help to find out the issue with the gas valve. Now just keep the old one as a reserve. Very satisfied with this purchase.

PCB looks better finished then the previous replacement unit.