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What fuse controls the heater in a 94 Chevy Cheyenne?

There are two fuses that control the heater in a 1994 Chevy Cheyenne:

- Fuse #20 (10 amps): This fuse is located in the under-dash fuse block and powers the heater blower motor.

- Fuse #27 (10 amps): This fuse is also located in the under-dash fuse block and powers the heater control module.

If either of these fuses is blown, the heater will not work. To check the fuses, simply pull them out of the fuse block and inspect them for a broken filament. If the filament is broken, the fuse is blown and will need to be replaced.

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