Buy, repair, or exchange GE DS3800NTCF1B1B - GE MARK IV THERMOCOUPLE COND. from World of Controls. We ship worldwide. Request a quote or contact our team for more details today. WOC offers a conditional warranty of 24 months on the supply of Speedtronic cards and 12 months on the repair of Speedtronic cards. All exchanged cards are backed by a 24-month conditional warranty, ensuring long-term reliability and confidence.