[mrjimbo]

Help please!
2 years ago replaced control display head, main power relay, etc
Now bake element wont heat.....everything else works....continuity checks out on bake element
can i just replace relay board?

[Gene]

According the electric diagram (view attached file) the problem is the K1 Bake relay.

- The part number for the relay board is AP3383664

Here are the break down diagrams for the Thermador oven/microwave combo Model SMW272B

Gene.

[mrjimbo]

Gene....thanks amillion....I cant thank you enough

[Gene]

You are welcome. Happy Holidays!

Gene.

[tanner14541]

Hi Gene:
Do I need to pull out the Thermador oven (SWM 272) in order to replace this relay?

Thanks,
Tanner

[Gene]

Originally Posted by tanner14541

Hi Gene:
Do I need to pull out the Thermador oven (SWM 272) in order to replace this relay?

Thanks,
Tanner

Tanner,

The model number you posted does not come up. Verify and repost it.

Gene.

[tanner14541]

Hi Gene:

The correct model is SMW272, sorry for the typo. Thank you for your quick reply.

Tanner

[markc35]

Today was the third time since I bought this single oven range 10 years ago that I've had the opportunity to repair this board. This is a $2.00 (retail cost - closer to $0.50 for the manufacturer) Form 1A relay manufactured by a variety of suppliers. Every failure I've seen is the Bake relay. The OMRON series is an "8GP PCB Relay" that is is likely 9 V rated. I just looked up the replacement assembly and found it priced online at $745. In my opinion this is clearly a low quality design/reliability issue. I think its a sad statement about "just good enough to get by" design. Imagine the anguish and frustration that might have been saved for an additional 0.10 or $0.20 it would cost for a slightly more durable component.

[LincBelt]

Originally Posted by markc35

Today was the third time since I bought this single oven range 10 years ago that I've had the opportunity to repair this board. This is a $2.00 (retail cost - closer to $0.50 for the manufacturer) Form 1A relay manufactured by a variety of suppliers. Every failure I've seen is the Bake relay. The OMRON series is an "8GP PCB Relay" that is is likely 9 V rated. I just looked up the replacement assembly and found it priced online at $745. In my opinion this is clearly a low quality design/reliability issue. I think its a sad statement about "just good enough to get by" design. Imagine the anguish and frustration that might have been saved for an additional 0.10 or $0.20 it would cost for a slightly more durable component.

Check the relay's soldered nodes on the PCB - if this is an oven that has run just fine for a LONG period of time, you may be having an intermittent connection, Vs. a bad relay. I am dealing with a very similar issue, on an Amana using a bank of OMRON G8P-UA (24v) relays. I've found that several of the soldered nodes are "cold" - one had blown away completely (on the BAKE relay), and the other was intermittent. The second responded well to re-soldering with a touch of silver solder filler. I decided to re-solder all the critical nodes on the board, anticipating future similar failures. Time will tell if the relays need replacing, or the whole board. Good luck..!