What does the Viessmann 455 fault code mean?

Your boiler has shut itself down because its control system detected an internal glitch in how it runs, and it is stopping as a safety precaution.

How much does it cost to fix Viessmann error code 455?

Typical repair cost for the Viessmann 455 fault is £200-450 including labour.

Can I fix Viessmann fault code 455 myself?

Turn off the boiler at its on/off switch and at the fused spur or isolator nearby, then wait about 5 minutes.

Viessmann 455 Fault Code: What It Means & How to Fix It

What the manual says

Manufacturer manual

Error in program run monitoring

From this model's manual

Verified against the Viessmann/Viessmann Vitodens 050 W B0ha B0ka 6194588 installation & service manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

454View →456View →

All 131 fault codes on the Vitodens 050-W B0KA-25

Seeing a different code? Every code this model can display, in one place.

7 8 13 14 49 50 57 58 59 62 63 64 67 68 69 70 71 72 73 74 75 77 78 87 89 95 104 142 161 163 182 183 184 299 346 347 348 349 350 351 352 353 354 355 357 359 361 364 365 366 367 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 393 394 399 400 401 402 403 404 405 406 408 410 416 417 418 425 446 447 448 449 450 451 452 453 454 456 457 458 461 462 463 464 467 468 471 474 527 528 540 574 575 576 577 578 579 682 683 684 694 738 766 767 799 979 980 981 982 E10 E12

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Your boiler has shut itself down because its control system detected an internal glitch in how it runs, and it is stopping as a safety precaution.

What the manual says

Engineer required

Avoid the next call-out bill

Related fault codes

All 131 fault codes on the Vitodens 050-W B0KA-25

Related guides you might find useful

Boiler won't turn on: 9-step checklist

When to replace your boiler

Is boiler cover worth it?

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