ServiceNomad RV · Knowledge
Progressive Dynamics Converter Failure
Progressive Dynamics converters are highly regarded for reliability, but like all electronics, they can fail. When a PD converter stops functioning, symptoms include loss of 12V power to all systems when plugged in, batteries that won't charge, or the converter producing excessive heat and noise. Understanding how these units fail helps you diagnose whether the issue is the converter itself or upstream wiring and breakers.
PD Converter Operation and Charge Modes
Progressive Dynamics Inteli-Power converters use a three-stage charging algorithm: Boost (14.4V for rapid charging), Normal (13.6V for float maintenance), and Storage (13.2V for long-term storage). The converter automatically transitions between these modes based on battery state. If the converter cannot sense battery voltage correctly due to wiring issues or internal failure, it may get stuck in the wrong mode or fail to output power at all. The Charge Wizard LED on the front panel indicates which mode the converter is in. If the LED is off or flashing erratically, the converter is either not receiving input power or has failed internally.
Thermal Shutdown and Overload Protection
PD converters have built-in thermal and overload protection. If the converter is subjected to prolonged high-draw conditions (like running multiple slide-outs and a high-capacity inverter simultaneously), it will heat up and eventually shut down to protect itself. This thermal shutdown is usually temporary—the converter will restart once it cools. However, repeated overheating can damage internal components. If you notice the converter body is hot to the touch and the fan (if equipped) is running constantly, you may be overloading the converter. Check the converter's amp rating and compare it to your total 12V load. Upgrading to a higher-capacity model may be necessary.
Fuse and Wiring Inspection
PD converters have both AC input and DC output protection. The DC output typically has a high-amperage fuse (60-90 amps depending on model) located on the output bus bar. If this fuse blows, all 12V power is lost even though the converter may appear to be running normally. Check this fuse first before assuming the converter has failed. Also inspect the AC input wiring. If the circuit breaker feeding the converter is marginal or the wiring connections are corroded, the converter may receive insufficient voltage and fail to operate properly. Clean all connections and ensure breakers are tightly secured.
Warranty and Replacement
Progressive Dynamics offers excellent warranty support for their converters. If your unit is within warranty and has failed, contact PD customer service—they often provide troubleshooting guidance and may send a replacement unit if a defect is confirmed. If out of warranty, replacement units are readily available from RV parts suppliers. Installation of a new PD converter is straightforward for a qualified technician—the units are designed for easy mounting and have clearly labeled input/output terminals.
⚠️ Safety Notes
- Always disconnect shore power before working on converter wiring or fuses.
- Do not exceed the converter's rated amperage—this can cause fire or permanent damage.
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