Repair Services from the Testo Service Department

Our exceptional Service Department consists of highly qualified technicians ready to repair or service your Testo instrument, should the need arise. Our specialists are highly regarded for their expertise and always strive for excellence. Customer satisfaction is always paramount to us, and Testo’s average turnaround time for repair is among the best in the industry. Let our trained staff of professional technicians repair your measuring instrument to your satisfaction.

Testo Service Department FAQs

How do I send in an instrument for repair or service?
To keep your instrument in peak working order and to guarantee its continued accuracy, periodic calibration and service is recommended.
To obtain service on items in or out of warranty, please send your product to:

Testo North America, Service Department
40 White Lake Road
Sparta, NJ 07871
Phone: 800-227-0729
Fax: 862-354-5019


Please follow these simple instructions:

  • Complete the instrument repair and calibration form here.
  • Be sure to fill out the form entirely and include proof of purchase for warranty claims.
  • Distributors can request in writing that repairs are drop shipped directly to the customer.
  • We are not responsible for personal items sent with the unit (hoses, tools, etc.).


Customers submitting instrument(s) for calibration or service will receive a quote after receipt of instrument and processing of associated service/calibration repair form. Work will be completed after customer approval and returned promptly.

Please note: Instruments left at Testo for more than 30 days without a quote approval or without proper paperwork will be returned in their original condition to the owner/distributor and incur the minimum labor charge and/or reexamination fee and all subsequent shipping charges. In the event the equipment is left at Testo for over 90 days, Testo reserves the right to dispose of the equipment. Testo is not responsible for typos or misinformation.

What is Testo’s Service Department contact information?
Testo, Inc., Service Department 40 White Lake Road Sparta, NJ 07871 Phone: 800-227-0729 Fax: 862-354-5019 Email:

Do I need to approve the work to be done beforehand?
Yes. The Testo Service Department will contact you at the contact information supplied on the Instrument Repair Form, to get approval for the necessary work before the repair is made.

Do I need to send an RGA / RMA?
No, an RGA or RMA (Returned Goods Authorization / Returned Material Authorization) is NOT required.

What is your policy for over-the-counter exchanges?
Over-the-counter exchanges are not encouraged, and need prior approval from Testo.

How do I achieve a micron reading with my testo 557 RSA (Refrigeration System Analyzer)?
To achieve a micron reading, the vacuum measuring mode must be set to psia.

Where is the form I need to send an instrument in?
Please download below: