IKEA by Whirlpool 42" Range hood lights out
 

The four halogen lights all went out at the same instant. Fan continues to work. light switch relay is heard activating, but no lights.

Any ideas???

IKEA by Whirlpool Range hood mystery
 

All four lights went off simultaneously. Wiring diagram indicates TWO transformers. is it likely these both failed at the same time, or is it a switch on the circuit board? pushing the light switch makes a relay on the board click as normal, but no lights.

I sure could use some advise, including how with my volt meter I could possibly test to determine which part is bad.

Check for 120 VAC to each transformer primary windings from the control board. If there is nothing wrong then check for 12 VAC from each transformer secondary windings. Post the results.

Here are the breakdown diagrams and Replacement parts for WHIRLPOOL IH8432RS1 | AppliancePartsPros.com

Gene.

Per the wiring diagram, I located the power from the control board (P14 & P15). The two transformers are fed from this single point of contact. Voltage is present. Power is going to the transformers. From the step-down side (12v) there is nothing. This would suggest both transformers failed simultaneously? The light switch relay on the board gets very hot (just for info)

Have you disconnected the light wires from the transformers before measuring low voltage?

Gene.

yes, single plug between transformers and lights: one transformer for each two lights. tested voltage with switch on, probing contacts at plug.

Looks like both transformers have gone bad.

- The transformer Part number: AP3846624



Gene.

thanks very much for your help!

You are welcome. Keep us posted.

Gene.