diff --git a/apps/machine/electron/hal-service.ts b/apps/machine/electron/hal-service.ts
index e5b2df8..f13bfdc 100644
--- a/apps/machine/electron/hal-service.ts
+++ b/apps/machine/electron/hal-service.ts
@@ -70,10 +70,11 @@ export async function initializeHal(config: HalConfig): Promise<HalInstance> {
   })
 
   // Initialize dispenser
-  await dispenser.init({
+  const dispenserInitData = {
     fiatCode: valConfig.fiatCode,
     cassettes: dispConfig.cassettes,
-  })
+  }
+  await dispenser.init(dispenserInitData)
   console.log('[HAL] Dispenser initialized')
 
   // Start validator
@@ -148,6 +149,13 @@ export async function initializeHal(config: HalConfig): Promise<HalInstance> {
     dispenseCash: async (amounts): Promise<DispenseResult> => {
       console.log('[HAL] Dispensing:', amounts)
 
+      // Re-initialize dispenser if it was closed after a previous error
+      if (!dispenser.initialized) {
+        console.log('[HAL] Dispenser not initialized, re-initializing...')
+        await dispenser.init(dispenserInitData)
+        console.log('[HAL] Dispenser re-initialized')
+      }
+
       const notes: number[] = new Array(cassetteDenominations.length).fill(0)
       for (const { denomination, count } of amounts) {
         const idx = cassetteDenominations.indexOf(denomination)
diff --git a/apps/machine/src/services/hal.ts b/apps/machine/src/services/hal.ts
index b9041d3..d89339b 100644
--- a/apps/machine/src/services/hal.ts
+++ b/apps/machine/src/services/hal.ts
@@ -93,10 +93,11 @@ export async function initializeHalServices(config: HalConfig): Promise<HalServi
   })
 
   // Initialize dispenser
-  await dispenser.init({
+  const dispenserInitData = {
     fiatCode: valConfig.fiatCode,
     cassettes: dispConfig.cassettes,
-  })
+  }
+  await dispenser.init(dispenserInitData)
   console.log('[HAL] Dispenser initialized')
 
   // Start validator
@@ -121,6 +122,13 @@ export async function initializeHalServices(config: HalConfig): Promise<HalServi
     dispenseCash: async (amounts) => {
       console.log('[HAL] Dispensing:', amounts)
 
+      // Re-initialize dispenser if it was closed after a previous error
+      if (!dispenser.initialized) {
+        console.log('[HAL] Dispenser not initialized, re-initializing...')
+        await dispenser.init(dispenserInitData)
+        console.log('[HAL] Dispenser re-initialized')
+      }
+
       // Translate { denomination, count }[] to number[] by cassette position
       const notes: number[] = new Array(cassetteDenominations.length).fill(0)
       for (const { denomination, count } of amounts) {