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COZY DVCF40 - User Manual

COZY DVCF40
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1018028-BPage 1
DIRECT VENT
COUNTERFLOW
WALL FURNACE
Installation and
Operating Instructions
Cozy Heating Systems, LLC | cozyheaters.com | 888-444-1212 | 250 West Laurel Street | Colton, CA 92324
- The coating selected to provide longer life to the heat exchanger      . Please provide adequate
ventilation if this occurs.
 DO NOT attempt any of


 

 
                       

NATURAL GAS - DVCF403C
-
H, DVCF553C
-
H, DVCF407C-H, DVCF557C-H
PROPANE GAS - DVCF404C-H, DVCF554C-H, DVCF408C-H, DVCF558C-H
DVCF55
DVCF40
WARNING: Operation of this furnace without the properly installed, furnished vent system and vent cap could result in Carbon
Monoxide (CO) poisoning and possible death. For your safety, this furnace and the vent system should be inspected at least
annually by a qualified service technician.
WARNING:
This product can expose you to chemicals including epichlorohydrin
which is known to the State of California to cause cancer and birth defects and/or
other reproductive harm. For information go to 
!
WARNING: 
,
alteration, service or maintenance can cause

for proper installation. For assistance or for

service agency or the gas
supplier.
!
!
WARNING: If the information in these instructions
is not followed exactly, a re or explosion may result
causing property damage, personal injury or loss of life.
Do not store or use gasoline or other ammable vapors and
liquids in the vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance.
Do not touch any electrical switch; do not use any phone
in your building.
Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
If you cannot reach your gas supplier, call the re
department.
Installation and service must be performed by a qualied
installer, service agency or the gas supplier.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.

Questions and Answers

  • A
    Ashley NguyenAug 27, 2025
    Why COZY DVCF40 Wall Furnaces standing pilot won’t light or stay lit?
    • P
      Pamela DixonAug 27, 2025
      If the pilot won't light or stay lit, there might be air in the line, so bleed the line. The thermocouple could be defective, so replace it. The pilot flame might be too low, so adjust it. Also, the manual reset switch might not be engaged, so depress the red button on the switch.
  • A
    adamshafferAug 25, 2025
    Why my COZY DVCF40 Wall Furnaces burner won’t turn on?
    • B
      Becky BeasleyAug 26, 2025
      Several issues could prevent the burner from turning on. First, ensure the gas valve is in the “on” position. Check for 24 Volts to the valve from the transformer. Verify the wall thermostat is functioning correctly. Ensure there is 115 V line voltage. The gas valve itself may be defective and need replacement. Lastly, check if the manual reset switch is engaged by depressing the red button on the switch.
  • A
    atorresAug 23, 2025
    Why won't my COZY DVCF40 Wall Furnaces burner turn off?
    • C
      Cody DayAug 23, 2025
      The burner might not turn off due to several reasons. It could be a defective or damaged thermostat wire or the thermostat itself; this can be checked by removing the wire from the valve terminal. If the valve goes off, replace the wire or thermostat. The thermostat location might be incorrect, so follow the installation instructions and check the location. A defective or sticking valve can also cause this issue, requiring valve replacement. Finally, excessive gas pressure could be the cause; contact the utility supplying gas in this case.

COZY DVCF40 Specifications

General IconGeneral
BTU40, 000
Fuel TypeNatural Gas or Propane
Efficiency80%
VentingDirect Vent
Weight85 lbs
Heating CapacityUp to 1, 000 sq. ft.

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