diff --git a/pioreactor/background_jobs/temperature_automation.py b/pioreactor/background_jobs/temperature_automation.py
index f46b7f4d..fcc2ddd4 100644
--- a/pioreactor/background_jobs/temperature_automation.py
+++ b/pioreactor/background_jobs/temperature_automation.py
@@ -334,7 +334,7 @@ def setup_pwm(self) -> PWM:
         # impact (mainly: current sink), over the second. Ex: imagine freq=1hz, dc=40%, and the pump needs to run for
         # 0.3s. The influence of when the heat is one on the pump can be significant in a power-constrained system.
         pin = hardware.PWM_TO_PIN[hardware.HEATER_PWM_TO_PIN]
-        pwm = PWM(pin, hertz, unit=self.unit, experiment=self.experiment)
+        pwm = PWM(pin, hertz, unit=self.unit, experiment=self.experiment, pubsub_client=self.pub_client)
         pwm.start(0)
         return pwm