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b. Out of, or low on gas. Propane gas sometimes are contaminated with air,
especially new tanks upon their first filling. Cycle the portable tankless
water heater on and off by using the shower head switch several times to
purge the air from the gas. If this doesn’t clear the air then the tank must
be purged.
c. One of the ignition sensors is bent and/or too close to the burner. Look
to ensure that the ignition pins and the heat sensor are completely
vertical and they do a 90 degree to the back of the box. If they are not
straight (i.e. a 45 degree angle) then you can straighten them with pliers.
d. The thermocouple is either too high or too low to complete the circuit.
Check to ensure that the thermocouple is flush with the hold in the heat
exchanger.
e. The gas sensor wire (looks like a black ground wire on the gas regulator)
flange might have come loose or is no longer connected.
f. There is a faulty heat sensor. This is usually diagnosed by taking the front
case off of the portable tankless water heater and let it run. If it continues
to operate, then one of the sensors and/or the wire harness needs to be
replaced. This may also be caused by insufficient clearance on the back
of the portable tankless water heater where the majority of air intake is.
g. The valve on the propane tank should be all the way “Open”.
h. Fresh batteries are required for ignition spark. Make sure batteries are
aligned in the proper polarity (+/-).
The water does not get hot enough:
a. You are operating the portable tankless water heater above 2,000 feet/
600 meters. We only recommend using it below elevations of 2,000 feet.
b. Look into the viewer panes (middle horizontal windows on the front
cover) to see if there is a blue flame. If the flame is yellow there could be
a cracked gas regulator. Do Not Attempt to use the portable tankless
water heater.
Water is flowing, but there is no hot water coming out:
a. Ensure that you have the incoming water supply and the outgoing water
supply hooked up properly. Your water supply should be attached to your
incoming connection (located on the far right) and the shower head
should be attached to the outgoing water (located as the middle
connection).
b. Ensure that you have adequate water pressure of at least 3.6 PSI/25 kPa,
sustained.
