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GE PHP9036DJ2BB induction cooktop blowing fuses

jas04

Premium Member
Joined
May 8, 2022
Messages
3
Location
Texas
Model Number
PHP9036DJ2BB
Brand
GE
Age
1-5 years
Hi all, we had a storm roll through a few days ago and had a nearby lightning strike. We were in the kitchen when that strike hit and immediately heard a pop in our induction cooktop. We had the front left burner on at the time. Three breakers including the one for the cooktop tripped. After that, the cooktop would turn on, but power down after about 10 seconds.

I'm getting a "61 - Cannot communicate with induction module that powers left coils" error code.

I've started digging into it and found that the fuse in this image (left fuse of the left filter board) was most definitely blown.

cooktop fuse.png

I replaced it with another 20A 250V fast-blow fuse and crossed my fingers. When I had it back together and flipped the breaker, the breaker instantly tripped again and the new fuse blew. So it is a symptom and not the cause unfortunately. I've got a short somewhere but I'm not seeing any obvious damage anywhere else. I've gently peeled back the insulation from the front left burner that was on and there aren't any scorched wires. I get continuity through the coil and ~.1 -.2 ohms resistance (not sure if that's right or wrong, but that matched what I saw on the back left coil).

I've tried seeing what happens when the three coils on the left and the "problem fuse" are physically removed from the cooktop. It behaves the same as right after I turned the breaker back on after the lightning strike. I could start heating a pot of water on the back right burner and after about 10 seconds or so, the cooktop would turn off (no breakers or fuse blowing, just as if I had pushed the off button on that burner).

Since the right side is acting wonky, I'm hesitant to start blindly buying parts for the left side. Hoping someone can tell me if that's an expected behavior (like it detects a fault code anywhere in the system and just shuts down out of an abundance of caution).

I'd love any ideas on potentially tracking down the short.... The filter board seems like a good place to start, but I sure would have like to have seen something that gave me a better indication... For "possible fixes", the service sheet said to 1) check the wires connecting the UI to the induction tray, 2) replace the UI, 3) replace the induction tray. Won't take too many bad guesses to get to the point where it would have made more sense to replace the whole thing (which is certainly not ideal right now $$$).

Any ideas are greatly appreciated!!
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
131,550
Location
Redmond, Oregon
Hi, I haven't worked on this model as of yet, but our tech @bigbuck posted lots of tech. data information in post #4 here:

Check all the boards for any burnt components on them first that would keep making that fuse blow.

Here's the parts diagram for your model:

Jake
 

jas04

Premium Member
Joined
May 8, 2022
Messages
3
Location
Texas
Thank you Jake... wish there was something obvious, but I'm just not seeing it (you'd think there'd be some clearly burnt areas with 25A + running wild!). I had a thought this morning and I'm just about to flip the breaker and test. I've isolated that filter board where the fuse blew by unplugging the UI and the downstream generator boards. Popped in a new fuse and am going to see if that blows it (hoping it does as that would at least tell me the filter board is shot).
 

jas04

Premium Member
Joined
May 8, 2022
Messages
3
Location
Texas
Progress... Isolating the filter board (no UI, no generator boards) did not trip the breaker or blow the fuse. Going one small step further, I plugged in the power leads to the generator board (with no induction elements attached) that drives the left element and it did immediately blow the fuse and trip the breaker. That doesn't necessarily eliminate the filter board, but I think it does tell me that the generator board has issues (and since the glass cooktop/UI is unplugged it HOPEFULLY means that is still ok). Going to pull the generator board and see if maybe the back side shows burns.
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
131,550
Location
Redmond, Oregon
Going to pull the generator board and see if maybe the back side shows burns.
Sounds good, let us know what you find.

Jake
 
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