Systems, methods, and apparatus to provide preheat voltage feedback loss protection

A welding-type system, comprising:

• a welding-type power source configured to provide welding-type power to a welding-type circuit, the welding-type circuit comprising a welding-type electrode and a first contact tip of a welding torch;
• an electrode preheating circuit configured to provide preheating power through a first portion of the welding-type electrode via a second contact tip of the welding torch;
• a preheat feedback circuit configured to measure a preheat voltage;
• and
• an electrode preheat control circuit configured to:
• control the preheating power based on the preheat voltage;
• and
• control the electrode preheating circuit to reduce the preheating power in response to detecting an invalid preheat voltage measured by the preheat feedback circuit, wherein detecting the invalid preheat voltage is indicative of a loss of preheat voltage feedback from the preheat feedback circuit to the electrode preheat control circuit.