Harman Invincible mfd 1994

[BLUE4NOW]

Any help on the following issue will be greatly appreciated.
3 blink error "ESP (Exhaust sensing probe) failure. Manual reset does not clear error.

Thanks

 

[Maladjusted]

I'd say replace the ESP and see what happens.

 

[BLUE4NOW]

I have no idea where to get them... dealer says the are no longer made.

 

[Maladjusted]

I would shoot an email to Harman... ask them if there is a viable replacement. They have been very good responding to my inquiries. (Asking for an app to control my Absolute63).

Mal

 

[BLUE4NOW]

Thank you!!

 

[Tim_M]

I would be interested to hear Harman's response since I have the same stove and had to replace my ESP a few years ago. I've been concerned about finding another one should I need to replace it again someday. Please keep us posted.

 

[Maladjusted]

If you run into a brick wall... don’t fret just yet.

I’m assuming an ESP is just a thermocoupler... that creates millivolts as it heats. I would bet you could find a suitable replacement as literally thousands of HVAC, Plumbing, Grill, etc devices utilize them. Even Automotive applications use exhaust temp sensors.

Mal

 

[Invincible RS]

You can buy the ESP still, the black wire ones, are the older ones, which you'll need. I purchased one a few weeks back, just do a google search and they will come up. Amazon even had them, I found one cheaper some where else. You can use the newer red wire ones as well,(which are less expensive), just need to change the dip switch #5 to on, or to the up position, that is located on the back of your control board. I was having the same problem as you, with an Invincible RS, bought a new ESP, didn't fix my problem. I even tried a new room sensing probe, didn't fix problem. I went ahead and bought a new control board, that fixed my three blink error, now works fine.

 

[Invincible RS]

https://www.amazon.com/dp/B00GOD3QD0/?tag=hearthamazon-20.

This is actually the one I bought, worked for me? I thought I bought it some where else, but when looking back I found a few on Amazon, and found this one there cheaper than the other ones.

 

[Tim_M]

I’m not sure if the OP has the Invincible RS or the earlier T version. Mine is a T mfg in’93, and I’m pretty sure the ESP you got from Amazon wouldn’t work on mine, it looks very different.

Edit: I just realized the OP must have the RS version since my T doesn’t have blink codes.