Cumberland Stove Works MF3700 Troubleshooting Guide, Problem Cause Too rich air/fuel mixture

INSTALLATION AND OPERATION MANUAL

MF3700, MF3800 Models

TROUBLESHOOTING GUIDE

Unplug stove before performing any maintenance.

WARNING

NEVER SERVICE OR TOuCH THE FEED AUGER WITH THE STOVE PLUGGED IN.

Problem	cause: Too rich air/fuel mixture
? Fire burns with a lazy, orange	 Make sure glass door is shut and	 Moisture content of fuel above 15%. Allow fuel to
flame and/or fuel builds up in the	sealed tightly. If not, adjust door handle	dry.
fire pot. Glass may become dirty.	or replace gasket.	 Check inside parlor stove and exhaust pipes for
	 Check that ash pan is in place and
		blockage. Tap inside walls of firebox, clean behind
	properly sealed.	side access plates, clean fire pot and firebox vent
	 Check that firepot is back all the way	holes above firebrick panel.
	and sealing with the potholder	 Feed rate is too high for fuel, reduce range set-
	 Check that exhaust blower is running	ting.
	and venting properly. If not, check con-	 Check to make sure that exhaust vent is not
	nection and clean or replace.	blocked.
Problem	CAUSE: Fire pot burns out of fuel
? Fire goes out or parlor stove	 Hopper empty, refill	are found in hopper. Auger jams are evident when
shuts down. Fuel may stop feed-	 Hopper door is open.	the auger motor runs but no fuel is delivered.
ing.		 Hopper switch is not functioning properly or not
	 Auger jams. Remove auger and
		conntected to the controller.
	clean. (Auger jams can be a problem if
	poor quality fuel is used. Or excessive
	fines (sawdust, corn cobs or husk)
Problem	CAUSE: Auger stops turning
? Fire goes out or parlor stove	 Feed auger has come loose. Check	 High limit sensor. Evident when parlor stove is ex-
shuts down. Fuel may stop feed-	to see if auger motor is turning and au-	tremely hot. Allow parlor stove to cool for one hour
ing.	ger is not.	and restart.
	 Heat sensor. If the operating tem-	 Vacuum switch tripped. Caused by exhaust blower
	perature is too low the parlor stove will	not running or venting blocked. Check blower, clean
	shutdown.	or replace. Clean venting of blockage.
		 Auger motor not operating. Inspect connection
		and replace if necessary.
Problem	CAUSE: Loss of vacuum
? Stove fans are not running.	 Make sure glass door is shut and	 Faulty fans or control board. Call your dealer or
	sealed tightly. If not, adjust the door	customer service for advance diagnostics.
	handle or replace gasket.
	 Heated room is under negative pres-
	sure, check the make-up air fans and
	ducts.

Contact service provider if above remedies fail, contact dealer or call CSW customer service at 800-345-6007.

WARNING! Negative pressure in a home is a serious issue. If there is a problem, the stove should be installed with a Fresh Air Kit (not included).

800-345-6007 CumberlandStoveWorks.com Page 23