Non-emergency Support

If you have a non-emergency technical question, please send a detailed e-mail that includes your name, company name, phone number, product, part(s) in question, and any other related information. Someone from the OTC DAIHEN Service Department will contact you within the next business day.

Send a non-emergency message

24-hour Emergency Service

In the event of an emergency after normal business hours (Monday through Friday, 8 a.m. - 5 p.m. Eastern Time), technical support is available via phone. Simply call our support line and leave your name, company name, phone number, and a brief description of your problem. A service technician will return your call as quickly as possible. The after-hours support number is 1-866-460-8566.

Customer Service

For all customer service matters, please contact us using one of the following methods:

1. Email us: Customer Service
2. Call us: +1 (937) 667-0800

Training Classes

For more information about training and dates, please visit our training page:

Training page

Onsite Technical Support

When you are in need of onsite technical support from our staff, please complete the following form.

Onsite Technical Support Form

In-house Repair Information

For more information about returning equipment to OTC DAIHEN for evaluation and repair authorization, please visit our repair request page.

In-house Repair Request

Quick Tips

  • Most problems can be resolved over the phone. If you are experiencing any problems, please first contact one of our service technicians for support.
  • In some cases, an OTC DAIHEN service tech may be required to visit your facility.
  • For questions on service rates, method of payment or billing questions regarding service, please contact the Operations Coordinator at +1(937) 667-0800, or via email