diff --git a/Arduino/BTCDieselHeater/data/index.html b/Arduino/BTCDieselHeater/data/index.html
index 76c9caa..21031be 100644
--- a/Arduino/BTCDieselHeater/data/index.html
+++ b/Arduino/BTCDieselHeater/data/index.html
@@ -499,7 +499,7 @@ display: none
 <div>
 
 <b>Pump Max: </b><span id="PumpMax"> </span>
-<input type="range" id="PumpMax" min="1" max="10" step=".1" oninput="onSlide(this.value, 'PumpMax')" onchange="onSlide(this.value, 'PumpMax')"> <span id="PumpMax"></span>
+<input type="range" id="PumpMax" min=".5" max="10" step=".1" oninput="onSlide(this.value, 'PumpMax')" onchange="onSlide(this.value, 'PumpMax')"> <span id="PumpMax"></span>
 </div>
 <div>
 <b>Fan Min: </b><span id="FanMin"> </span>