diff --git a/src/app/api/http/http.service.ts b/src/app/api/http/http.service.ts
index 909f072..9f38d52 100644
--- a/src/app/api/http/http.service.ts
+++ b/src/app/api/http/http.service.ts
@@ -12,7 +12,7 @@ import {ErrorService} from '../../services/error.service';
 export class HttpService {
 
     constructor(private httpClient: HttpClient,
-                protected localStorageService: LocalStorageService,
+                private localStorageService: LocalStorageService,
                 private injector: Injector) {
     }
 
@@ -70,6 +70,7 @@ export class HttpService {
             },
             error: err => {
                 errorService.httpError(err);
+                errorService.checkConnection();
                 this.subscriptionQueue.splice(this.subscriptionQueue.indexOf(subscription), 1)
             },
             complete: () => this.subscriptionQueue.splice(this.subscriptionQueue.indexOf(subscription), 1)
@@ -78,7 +79,7 @@ export class HttpService {
         return oob;
     }
 
-    private get<T>(request: RequestObj) {
+    get<T>(request: RequestObj) {
         return this.httpClient.get<T>(request.url,
             {
                 headers: request.header,
@@ -87,7 +88,7 @@ export class HttpService {
             });
     }
 
-    private post<T>(request: RequestObj) {
+    post<T>(request: RequestObj) {
         return this.httpClient.post<T>(request.url, request.data,
             {
                 headers: request.header,
@@ -96,7 +97,7 @@ export class HttpService {
             });
     }
 
-    private put<T>(request: RequestObj) {
+    put<T>(request: RequestObj) {
         return this.httpClient.put<T>(request.url, request.data,
             {
                 headers: request.header,
@@ -105,7 +106,7 @@ export class HttpService {
             });
     }
 
-    private delete<T>(request: RequestObj) {
+    delete<T>(request: RequestObj) {
         return this.httpClient.delete<T>(request.url,
             {
                 headers: request.header,
diff --git a/src/app/services/error.service.ts b/src/app/services/error.service.ts
index 6c52778..b68b35a 100644
--- a/src/app/services/error.service.ts
+++ b/src/app/services/error.service.ts
@@ -1,23 +1,52 @@
-import {Injectable, Injector} from '@angular/core';
-import {Response} from '../class/HttpReqAndResp';
+import {Injectable} from '@angular/core';
+import {RequestObj, Response} from '../class/HttpReqAndResp';
 import {HttpService} from '../api/http/http.service';
+import {environment} from '../../environments/environment';
+import {Router} from '@angular/router';
+import {ComponentStateService} from './component-state.service';
 
 @Injectable({
     providedIn: 'root'
 })
 export class ErrorService {
 
-    constructor(private httpService: HttpService) {
+    constructor(private httpService: HttpService, private router: Router,
+                private componentStateService: ComponentStateService) {
     }
 
+    private static HTTP_ERROR_COUNT: number = 0;
+    private readonly MAINTAIN_PAGE_PREFIX = '/maintain'
+
     public httpError(err: any) {
-        console.log('error=>', err)
+        if (!environment.production) {
+            console.log('error=>', err)
+        }
+        ErrorService.HTTP_ERROR_COUNT++;
         // this.httpService.getSubscriptionQueue().map(a => a.unsubscribe())
     }
 
     public httpException(response: Response<any>) {
-        console.log('exception=>', response)
+        if (!environment.production)
+            console.log('exception=>', response)
     }
 
-
+    public checkConnection() {
+        // The HTTP_ERROR_COUNT is start with 1 in this function
+        if (ErrorService.HTTP_ERROR_COUNT === 1) {
+            const req: RequestObj = {
+                path: '/headerInfo',
+                method: 'GET',
+                url: environment.host + '/headerInfo'
+            }
+            this.httpService.get(req).subscribe({
+                next: data => null,
+                error: err => {
+                    if (this.componentStateService.currentPath !== this.MAINTAIN_PAGE_PREFIX) {
+                        this.router.navigateByUrl(this.MAINTAIN_PAGE_PREFIX)
+                    }
+                    ErrorService.HTTP_ERROR_COUNT = 0;
+                }
+            })
+        }
+    }
 }