diff --git a/app.ts b/app.ts
index 7fe4f1a..59c4145 100644
--- a/app.ts
+++ b/app.ts
@@ -1,6 +1,6 @@
 import { App } from 'homey' // eslint-disable-line import/no-extraneous-dependencies
 import axios from 'axios'
-import withAPI, { getErrorMessage } from './mixins/withAPI'
+import withAPI, { getApiErrorMessage } from './mixins/withAPI'
 import type {
   LoginCredentials,
   LoginData,
@@ -9,6 +9,16 @@ import type {
   HomeySettingValue,
 } from './types'
 
+function getErrorMessage(error: unknown): string {
+  let errorMessage = String(error)
+  if (axios.isAxiosError(error)) {
+    errorMessage = getApiErrorMessage(error)
+  } else if (error instanceof Error) {
+    errorMessage = error.message
+  }
+  return errorMessage
+}
+
 axios.defaults.baseURL = 'https://www.ariston-net.remotethermo.com/api/v2'
 
 export = class AristonApp extends withAPI(App) {
@@ -50,13 +60,7 @@ export = class AristonApp extends withAPI(App) {
       this.refreshLogin(loginCredentials)
       return true
     } catch (error: unknown) {
-      let errorMessage = String(error)
-      if (axios.isAxiosError(error)) {
-        errorMessage = getErrorMessage(error)
-      } else if (error instanceof Error) {
-        errorMessage = error.message
-      }
-      throw new Error(errorMessage)
+      throw new Error(getErrorMessage(error))
     }
   }
 
diff --git a/mixins/withAPI.ts b/mixins/withAPI.ts
index 4d2f544..e8a0da8 100644
--- a/mixins/withAPI.ts
+++ b/mixins/withAPI.ts
@@ -14,7 +14,7 @@ type APIClass = new (...args: any[]) => {
   api: AxiosInstance
 }
 
-export function getErrorMessage(error: AxiosError): string {
+export function getApiErrorMessage(error: AxiosError): string {
   return error.message
 }
 
@@ -66,7 +66,11 @@ export default function withAPI<T extends HomeyClass>(base: T): APIClass & T {
       type: 'request' | 'response',
       error: AxiosError,
     ): Promise<AxiosError> {
-      this.error(`Error in ${type}:`, error.config?.url, getErrorMessage(error))
+      this.error(
+        `Error in ${type}:`,
+        error.config?.url,
+        getApiErrorMessage(error),
+      )
       await this.setErrorWarning(error)
       return Promise.reject(error)
     }
@@ -75,7 +79,7 @@ export default function withAPI<T extends HomeyClass>(base: T): APIClass & T {
       if (!this.setWarning) {
         return
       }
-      await this.setWarning(getErrorMessage(error))
+      await this.setWarning(getApiErrorMessage(error))
     }
   }
 }