Section IV Troubleshooting | Hubbell Electric Heater Company MSE

SECTION IV – TROUBLESHOOTING

Symptom	Probable Cause	Corrective Action / Remedy
No hot water	Circuit breaker tripped at	Reset circuit breaker.
	source.
	On/Off switch in ‘OFF’	Turn switch to ‘ON’ position.
	position, if installed.
	Circuit breaker at control	Reset circuit breaker.
	cabinet tripped, if installed.
	Blown fuse in element fuse	Replace fuse.
	block, if installed.
	Blown fuse in transformer, if	Replace fuse.
	installed.
	High limit switch tripped.	Reset high limit switch.

	Loose wires.	Tighten wires. Torque screws per
		torque chart included in Section
		VI.
	Heating element inoperable.	Check heating element operation
		by clamping an Amprobe around
		each wire to the element. The
		ampere reading should agree with
		the nameplate ‘AMP’ figure.
	Low line voltage.	Have source electrical system
		checked by an electrician.
	Faulty thermostat.	Move thermostat dial through full
		range. A definite ‘click’ should be
		heard. If not, replace thermostat.
	Faulty low water cut-off, if	Check to see if tank is full of
	installed.	water. If not, fill tank. If problem
		continues and tank is full, check
		for continuity between the
		common and normally open
		contact of the relay board. If
		continuity is not observed, replace
		low water cut-off.
	Magnetic contactor does not	Replace complete magnetic
	energize.	contactor. Because of the design
		of this particular contactor, it is
		more desirable to replace complete
		control rather than rebuilding coil,
		contacts and springs, etc.