brenthompson
Premium Member
- Model Number
- JJW9530CCS
- Brand
- Jenn-Air
- Age
- More than 10 years
Set the oven to 350. Once it gets there (this takes the normal amount of time), turn it off. Wait 5 minutes. Turn it back on (i.e. set it back to 350). Display indicates it's say 320 and preheating. Relays click (sounds like the K1/K2 relays with their 51 second/8 second cycle at the link below), but oven doesn't heat up. Leave it like this 5 minutes, turn it off, turn it on again, display now indicates say 280 and preheating, but again it's lying, it's not heating. If I wait long enough and the temp gets down to ~150 (not sure of the exact temp where it decides to work, seems to vary), it'll start heating again and get back up to 350. Then the cycle repeats itself.
I found this diagram on your site and it appears to match up to my circuit board - WP74006614. I'd replace it if I could but I can't find one anywhere.

When I first started looking at the problem, I noticed burnt solder on the DBL pin on K8. I re-soldered it and things improved (it didn't work at all before - what I'm describing now is current behaviour). I then replaced K8 (original was Omron G8P-UA-006204, replaced with T9AS5D12-12). No improvement.
I then replaced the temp sensor (WP 12001656) and lower element (WPW10310258) since they seem to be the common culprits in cases like this, no improvement.
About the only things I have left to change are
1- the upper element, but it doesn't seem likely to be the culprit
2- the high-limit thermostat (WP7403P899-60). On this model is this thing a thermostat or a thermal fuse? It would make sense if a bad thermostat was telling the oven not to heat due to over-temp. But if it's a single-shot fuse, it's not the culprit. I've tested it at room temp and resistance is 0 ohms.
3- the circuit board WP74006614, but again I can't find a replacement.
I do have a circuit diagram for the main board:

If you don't think it's the upper element or high-limit thermostat, can you suggest what component on the board might be at fault? This post which I re-read often talks about a sail switch but the sequence of events doesn't seem to match up, since my fan doesn't turn on until the oven has heated up.
I found this diagram on your site and it appears to match up to my circuit board - WP74006614. I'd replace it if I could but I can't find one anywhere.

When I first started looking at the problem, I noticed burnt solder on the DBL pin on K8. I re-soldered it and things improved (it didn't work at all before - what I'm describing now is current behaviour). I then replaced K8 (original was Omron G8P-UA-006204, replaced with T9AS5D12-12). No improvement.
I then replaced the temp sensor (WP 12001656) and lower element (WPW10310258) since they seem to be the common culprits in cases like this, no improvement.
About the only things I have left to change are
1- the upper element, but it doesn't seem likely to be the culprit
2- the high-limit thermostat (WP7403P899-60). On this model is this thing a thermostat or a thermal fuse? It would make sense if a bad thermostat was telling the oven not to heat due to over-temp. But if it's a single-shot fuse, it's not the culprit. I've tested it at room temp and resistance is 0 ohms.
3- the circuit board WP74006614, but again I can't find a replacement.
I do have a circuit diagram for the main board:

If you don't think it's the upper element or high-limit thermostat, can you suggest what component on the board might be at fault? This post which I re-read often talks about a sail switch but the sequence of events doesn't seem to match up, since my fan doesn't turn on until the oven has heated up.