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Several things could impact the blower's operation.
First, make sure the blower is receiving electrical power. If a red or green light is on your keypad, your blower is getting power. If you do not see this light, we suggest plugging something you know is working into the GFCI outlet under the tub. If the outlet is not working, you can try resetting your GFCI switch or consulting your electrician.
A red light indicates a communication issue between the keypad and the blower. A green light should indicate a functioning keypad and blower.
For further instructions, please look at Jetta's solutions labeled "Keypad Error Lights" or contact sales@jettacorp.com.