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Hydramaster 4.7 CDS Help

Diego-

New Member
Dec 22, 2020
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Diego Julio
Hello,
I recently bought an older Hydramster 4.7 CDS. Everything works great except it doesn't pump in water from the fresh water tank. and in these cold days I need to use the water on board. When I turn the machine on and turn the switch on for the fresh water pump the light doesn't even turn on (at Panel). I also can't hear the pump working. The pump is directly wired to the inside of the panel. How can I distinguish if this is a bad pump or an electrical issue?
 

SRD

Well-Known Member
Nov 6, 2010
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Spencer Dawdy
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Continuity and power check from hot on panel switch to hot on pump if you have both pumps bad. If your pumps one with a microswitch vs an internal bypass check the mucriswitch 1st
 

JDARNOLD

Active Member
Jul 31, 2012
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Edward Arnold
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United States
Hello,
I recently bought an older Hydramster 4.7 CDS. Everything works great except it doesn't pump in water from the fresh water tank. and in these cold days I need to use the water on board. When I turn the machine on and turn the switch on for the fresh water pump the light doesn't even turn on (at Panel). I also can't hear the pump working. The pump is directly wired to the inside of the panel. How can I distinguish if this is a bad pump or an electrical issue?
 

JDARNOLD

Active Member
Jul 31, 2012
335
131
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59
Real Name
Edward Arnold
Business Location
United States
When you say older, how old. When you look in the water box does it have a float like a toilet bowl, or does it have two switches one above the other. If you have the two switches the pump is wired to the switches through a relay. when both switches are down they turn on the pump and when both are up the pump cuts off. It could be the relay, the switches.
 
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