11-07-2022, 07:28 PM
On 712 the fans for coils and the circulation pumps are controlled by the Electronic controller,
The fans and pumps are turned on by the thermostat zone 1,3 heat, (I think coach is in Tampa and I am in Canada so I can not check)
If you have PAPST pumps just because the motor is turning does not mean the impeller is turning, they are magnetic drive I have had lots of trouble with mine, impellers crack and swell
I have broken off the loose pieces built up with JB Weld made an arbour for my lathe and used a tool post grinder to get it down to size
Now I have magnetic particles that are copper coloured that are getting between my impeller and shaft and seizing it up, I tried to make a screen for the intake of the pump but it is not working, I don't know what too do next I am getting tired of taking the pumps apart too clean them
The fans and pumps are turned on by the thermostat zone 1,3 heat, (I think coach is in Tampa and I am in Canada so I can not check)
If you have PAPST pumps just because the motor is turning does not mean the impeller is turning, they are magnetic drive I have had lots of trouble with mine, impellers crack and swell
I have broken off the loose pieces built up with JB Weld made an arbour for my lathe and used a tool post grinder to get it down to size
Now I have magnetic particles that are copper coloured that are getting between my impeller and shaft and seizing it up, I tried to make a screen for the intake of the pump but it is not working, I don't know what too do next I am getting tired of taking the pumps apart too clean them
John Kosir
712 2004 45-8