jhadams Report post Posted August 16, 2015 I recently decided to go ahead and replace a a Magneteck 6345 converter in an older Itasca Suncruiser. I replaced it with a PD 4645. The replacement was very easy but there was an appalling sight when I remover the 6345, The area under the converter was very scorched and brown. It looked like a disaster waiting to happen. I am so pleased to have made the change. The new unit is so quiet compared to the 6345. The 6345 hummed whenever ac power was applied. I definitely made a good decision to replace the unit. The modes of battery charging will also extend my battery life. I suspect there are a number of RVs out there with the same heat problems from converters. Share this post Link to post Share on other sites
jleamont Report post Posted August 16, 2015 Wow, looks like you dodged the bullet on that one! Was the fan working on it prior to failure? Share this post Link to post Share on other sites
hermanmullins Report post Posted August 17, 2015 Since you have already installed the new unit, I would check it for heat. If there is still an excess amount of heat you might consider raising the unit so air can circulate all around the unit. or maybe install a small cooling fan like in your PC. Herman Share this post Link to post Share on other sites
dickandlois Report post Posted August 17, 2015 jhadams, Your hot spot has shown up in other coaches and if memory is still working (kind of get a senior moment at times) they happened with the Magneteck units.They have had some less then favorable reviews.Could you tell if it looks like the heat was caused by the transformer or the power circuit board?Rich. Share this post Link to post Share on other sites
manholt Report post Posted August 17, 2015 OMG! Good reason to check on converter periodically....heading there now! Carl Share this post Link to post Share on other sites
jhadams Report post Posted August 17, 2015 The scorched area was right underneath the step down transformer. The fan is way in the back right corner. Did not even blow toward the transformer. The new Progressive Dynamics PD 4645 replacement has two variable fans and one is set to exhaust into an open grill area on the face of the enclosure. It was hard to tell if the Magneteck fan ever worked because the unit hummed as soon as AC power was turned on. I recommend that you check your converter to determine whether or not a potential problem may exist. The PD 4645 replaces and fits right into the lower section of the Magneteck unit. Share this post Link to post Share on other sites
dickandlois Report post Posted August 17, 2015 jhadams, Thanks for the information and the heads up regarding the cooling fan(s).Good information knowing that the new unit fit real well in existing setup.Rich. Share this post Link to post Share on other sites
