diff --git a/lab/src/components/Builder/index.jsx b/lab/src/components/Builder/index.jsx
index d433d510b..1449eeb25 100644
--- a/lab/src/components/Builder/index.jsx
+++ b/lab/src/components/Builder/index.jsx
@@ -41,6 +41,12 @@ class Builder extends Component {
     }
   }
 
+  componentWillUnmount() {
+    const { defaultAlgorithms, setCurrentAlgorithm, clearError } = this.props;
+    setCurrentAlgorithm(defaultAlgorithms[0]);
+    clearError();
+  }
+
   handleSubmitExperiment() {
     const dataset = this.props.dataset || this.state.dataset;
     const { currentAlgorithm, currentParams, submitExperiment } = this.props;
@@ -56,11 +62,6 @@ class Builder extends Component {
     setCurrentAlgorithm(currentAlgorithm);
   }
 
-  componentWillUnmount() {
-    const { defaultAlgorithms, setCurrentAlgorithm } = this.props;
-    setCurrentAlgorithm(defaultAlgorithms[0]);
-  }
-
   render() {
     const dataset = this.props.dataset || this.state.dataset;
     const { 
diff --git a/lab/src/data/builder/actions.js b/lab/src/data/builder/actions.js
index b0a764c45..447d8c1dc 100644
--- a/lab/src/data/builder/actions.js
+++ b/lab/src/data/builder/actions.js
@@ -4,6 +4,7 @@ export const SUBMIT_EXPERIMENT_SUCCESS = 'SUBMIT_EXPERIMENT_SUCCESS';
 export const SUBMIT_EXPERIMENT_FAILURE = 'SUBMIT_EXPERIMENT_FAILURE';
 export const SET_CURRENT_ALGORITHM = 'SET_CURRENT_ALGORITHM';
 export const SET_PARAM_VALUE = 'SET_PARAM_VALUE';
+export const CLEAR_ERROR = 'CLEAR_ERROR';
 
 export const submitExperiment = (algorithm, params) => (dispatch) => {
   dispatch({
@@ -34,4 +35,8 @@ export const setCurrentAlgorithm = (algorithm) => ({
 export const setParamValue = (param, value) => ({
   type: SET_PARAM_VALUE,
   payload: { param, value }
+});
+
+export const clearError = () => ({
+  type: CLEAR_ERROR
 });
\ No newline at end of file
diff --git a/lab/src/data/builder/index.js b/lab/src/data/builder/index.js
index b85cd6701..38ab16be4 100644
--- a/lab/src/data/builder/index.js
+++ b/lab/src/data/builder/index.js
@@ -4,7 +4,8 @@ import {
   SUBMIT_EXPERIMENT_SUCCESS,
   SUBMIT_EXPERIMENT_FAILURE,
   SET_CURRENT_ALGORITHM,
-  SET_PARAM_VALUE
+  SET_PARAM_VALUE,
+  CLEAR_ERROR
 } from './actions';
 
 const currentAlgorithm = (state = {}, action) => {
@@ -52,6 +53,7 @@ const error = (state = null, action) => {
       return action.payload;
     case SUBMIT_EXPERIMENT_REQUEST:
     case SUBMIT_EXPERIMENT_SUCCESS:
+    case CLEAR_ERROR:
       return null;
     default:
       return state;