Testo 310 Combustion Analyzer Kit w/ Case Probe Manuals – O₂ Sensor Error E04

Testo 310 Combustion Analyzer Kit w/ Case Probe Manuals – O₂ Sensor Error E04

Testo 310 Residential Combustion Analyzer Kit.

Unit powers on normally, completes startup, and the internal pump operates during testing. The display, buttons, and overall interface respond properly.

During testing, the unit displays error code E04, indicating an issue related to the O₂ (oxygen) sensor. Due to this, the analyzer does not complete normal combustion readings and may require sensor replacement, service, and/or professional calibration depending on intended use.

Includes:

* Testo 310 analyzer

* Probe and hose assembly

* Hard carrying case

* Accessories shown in photos

Cosmetic condition is good overall with normal signs of previous use. There is a small cosmetic chip/crack on the upper plastic housing (shown in photos) that does not affect physical operation.

The internal pump activates during startup testing. Item is being sold exactly as shown and described.

Please review all photos carefully for condition and included items before purchasing.

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Item Specifics:

* Brand: Testo

* Model: 310

* MPN: 0563 3100

* Type: Combustion Analyzer

* Country/Region of Manufacture: Germany

* Included Accessories: Probe, Hose, Hard Case, Manuals

* Condition: Used