Viessmann boiler error fault 74

When fault 74 appears on the boiler, it is time to replace the water temperature sensor.

Error code 74 might be caused by a problem with the system’s water temperature sensor and can sometimes be solved by replacing the sensor.

“viessmann boiler error fault 74” is a common boiler fault with many possible causes. It may be caused by a clogged condensate drain or the pressure switch failing to operate. Homeowners need to know what the cause of this error message is and what steps are needed to fix it.

Viessmann boiler error fault 74 can be caused by either an overfilled water tank or a faulty thermocouple.

Our technicians can diagnose what the issue is and fix the problem efficiently.

If you have this same issue, please get in touch with us; we will be more than happy to help!

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