Water Pumps - Coachmen RV Mirada General Maintenance & Troubleshooting

TROUBLESHOOTING
Water Heaters Continued
✔
should first open your relief valve to allow air into the tank. Secondly, take a small gauge wire or coat
hanger device and prod through the drain opening to eliminate any obstructions.
✔ After thoroughly draining the tank, flush the entire system from water inlet all the way to holding tank.
✔ Fresh water should be pumped into the tank with the assistance of the on-board pump or with the assis-
tance of external water pressure. Once again, external pressure may be hosed into the unit either
through the inlet or outlet found on the rear or the relief valve support located on the front of the unit.
Continue this flushing process for approximately five minutes allowing ample time for the fresh water to
agitate the stagnant water on the bottom of the tank and force the deposits through the drain opening.
✔ Upon completion of the steps above, close off the drain valve as well as the relief valve.
NOTE: If you use your vehicle frequently or for long periods of time, flushing the water heater several times
a year will prolong the life of the storage tank.

WATER PUMPS

Pump will not start/blows circuit.
✔ Check electrical connections, fuse or breaker, main switch, and ground connection.
✔ System pressurized. Relieve pressure.
✔ If the motor is hot, the thermal breaker may have triggered. It will reset when cool.
✔ Check charging system for correct voltage and good ground.
✔ Check for an open or grounded circuit or motor.
Will not prime/sputters. (No discharge/Motor runs)
✔ Check for hose kinked between tank and pump.
✔ Check the in tank strainer to see if clogged with debris.
✔ Check if there is water in the tank, or if air collected in the hot water heater.
✔ Check to see if the inlet tubing/plumbing is sucking in air at plumbing connections (vacuum leak).
✔ Proper voltage with the pump operating (+/10VDC minimum).
✔ Check pump housing for cracks or loose drive assembly screws.
✔ Make sure the valves or internal check valve are not being held open by debris or if rubber is swollen.
Noisy or rough operation.
✔ Check for plumbing which may have vibrated loose.
✔ If the pump is plumbed with rigid pipe, insulate or add fastener.
✔ Check for mounting feet that are loose or are compressed too tight.
Rapid cycling.
✔ Check pressure switch shut-off adjustment.
✔ Water filter/purifier should be on separate feed line.
✔ Check for restrictive plumbing, flow restrictors in faucets/shower heads.
Leaks from pump head or switch.
✔ Check for loose screws at switch or pump head.
✔ Check switch diaphragm to see if ruptured or pinched.
✔ Check for punctured diaphragm if water is present in drive assembly.
Pump will not shut-off/runs when faucet is off.
✔ Check outside plumbing for leaks, and inspect for leaky valves or toilet.
✔ Check for air trapped in outlet side (water heater) or pump head.
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