diff --git a/frappy_psi/qnw.py b/frappy_psi/qnw.py
index 913c6ea..384d530 100644
--- a/frappy_psi/qnw.py
+++ b/frappy_psi/qnw.py
@@ -73,7 +73,7 @@ class SensorTC1(HasIO, Readable):
 
 class TemperatureLoopTC1(SensorTC1, Drivable):
     value = Parameter('temperature', unit='degC')
-    target = Parameter('setpoint', unit='degC', min=-5, max=110)
+    target = Parameter('setpoint', unit='degC', min=-15, max=120)
     control = Parameter('temperature control flag', BoolType(), readonly=False)
     ramp = Parameter('ramping value', FloatRange, unit='degC/min', readonly=False)
     ramp_used = Parameter('ramping status', BoolType(), default=False, readonly=False)