diff --git a/frappy_psi/lakeshore.py b/frappy_psi/lakeshore.py
index 19aa369..64db28c 100644
--- a/frappy_psi/lakeshore.py
+++ b/frappy_psi/lakeshore.py
@@ -133,7 +133,7 @@ class HeaterOutput(LakeShore, HasControlledBy, HasIO, Writable):
         return max_power
 
     def set_range(self):
-        self.set_par('RANGE ', {self._range})
+        self.set_par('RANGE ', self._range)
 
     def percent_to_power(self, percent):
         return min((percent / 100) ** 2 * self._max_power,
@@ -154,8 +154,8 @@ class HeaterOutput(LakeShore, HasControlledBy, HasIO, Writable):
         self.set_heater_mode(3)
         self.set_range()
         percent = self.power_to_percent(target)
-        reply = self.set_par(f'MOUT {self.loop}, {percent:g}')
-        return self.percent_to_power(float(reply))
+        reply, = self.set_par(f'MOUT {self.loop}, {percent:g}')
+        return self.percent_to_power(reply)
 
     def set_heater_mode(self, mode):
         self.communicate(f'CSET {self.loop},{self.channel},1,1,0;.'
@@ -178,11 +178,10 @@ class TemperatureLoop340(HasOutputModule, Sensor340, Drivable, LakeShore):
             out.write_max_power(out.max_power)
         self.activate_output()
         out.set_range()
-        reply = self.set_par(f'SETP {self.loop},{target}')
-        return float(reply)
+        return self.set_par(f'SETP {self.loop},{target}')[0]
 
     def read_target(self):
-        return float(self.communicate(f'SETP? {self.loop}'))
+        return self.get_par(f'SETP {self.loop}')[0]
 
     def write_ctrlpars(self, ctrlpars):
         p, i, d = self.set_par(f'PID {self.loop}', ctrlpars['p'], ctrlpars['i'], ctrlpars['d'])