12-16-2014, 04:36 PM
Thanks for all your input and data. Rudy may be the closest to describing what I suspected. When running the coach heat, the AH temp will run around 120 to 130. I just don't think the coolant pump is circulating the enough flow to keep the AH warm. The engine temp is running around 200 as it should. In the warmer months the AH will read around 175 to 180.
Gordon, thanks for that info. Curiously enough the temp in the AH will climb 30 degrees if I turn on the preheat pump. Another clue that the circ rate from the water pump is not enough.
Yes, it could be a blockage in the cutoff valves. I will check that out.
Chappel, it is easy to associate the pressure in the system with differential pressure to move fluid or air from one place to another. The pressure on the radiator cap is static pressure, not differential pressure.
So, what I am hearing is that somewhere between coach 390 and 512, Newell stopped equipping the loop with an auxiliary pump.
Gordon, thanks for that info. Curiously enough the temp in the AH will climb 30 degrees if I turn on the preheat pump. Another clue that the circ rate from the water pump is not enough.
Yes, it could be a blockage in the cutoff valves. I will check that out.
Chappel, it is easy to associate the pressure in the system with differential pressure to move fluid or air from one place to another. The pressure on the radiator cap is static pressure, not differential pressure.
So, what I am hearing is that somewhere between coach 390 and 512, Newell stopped equipping the loop with an auxiliary pump.
Richard and Rhonda Entrekin
99 Newell, 512
Maverick Hybrid Toad
Inverness, FL (when we're home
)