ONLY in Atwood Hydroflame furnaces that specify part number 31501 or
33488, which are Fenwal Part Number 35-535811-113. Any other use voids
the product warranty and the agency listings, and can be hazardous.
The Fenwal 35-535811-113 is a 12 VDC Direct Spark Ignition Control designed for use in Atwood RV gas furnaces. The control utilizes a microprocessor to continually and safely monitor, analyze and control the proper operation of the gas burner. Integrated combustion blower control provides automatic backward compatibility with older models.
This kit includes the genuine Fenwal OEM control and is a direct substitute for Atwood furnace board kit
31501. The control board carries UL and CSA certification listings, unlike other aftermarket replacement controls that have limited or no safety agency certifications.
Adapter board 33727 makes this kit compatible with pre-2004 furnaces using Atwood Edge Connector style board 37875.
Fenwal Gas Ignition boards must be installed by a certified technician only. Follow installation instructions exactly.
Input Current Drain
300 mA @ 12 VDC, combustion blower and
gas valve relays energized (control only)
Gas Valve Rating
1.0A @ 12 VDC
Combustion Blower Rating
20.0A @ 12 VDC
-40°F to +176°F ( -40°C to +80°C)
Flame Failure Response Time
0.8 seconds maximum
Types of Gases
Natural, LP, or manufactured
16 sparks per second
4.25 x 3.25 x 1.80 inches
10.80 x 8.25 x 4.57 cm
Uncovered with integral standoffs
Conformal coated to operate to 95% R.H.
Tries for Ignition
Trial for Ignition Period
Prepurge & Inter-purge Timings
The Fenwal 35-535811-113 control cannot be serviced by the user. If any control faults are detected,
the Fenwal 35-535811-113 control must be
replaced by qualified service personnel. Risk of
explosion or fire can result if the control module
has been opened or with any attempts to repair it,
and the warranty is void
Before troubleshooting the system, check the following items:
The LED will flash on for 1/4 second, then off for 1/4 second
during a fault condition. The pause between fault codes is 3
Fenwal 35-535811-113 Installation Manual
Product: Fenwal 35-535811-113 12VDC Gas Ignition control
Service: Applicable Atwood Hydro Flame RV furnaces ONLY.
Kidde-Fenwal, Inc., d/b/a Fenwal Controls (hereinafter "Fenwal") warrants to the original purchaser that the enclosed Product will be free from defects in materials and workmanship and
that it shall conform to specifications published by Fenwal for a
period of four years. The warranty period begins on the date of
purchase and is valid only for Products purchased from an
authorized Fenwal dealer.
Fenwal's sole liability and obligation under this warranty shall
be to replace the Product through the original Fenwal dealer. All
claims must be pre-approved by the dealer, use the dealers
returned goods process and includedated proof of original purchase listing the Product (receipt or invoice). For a claim to be
validated, the Product:
This warranty applies solely to Products used in Atwood hydroflamefurnaces specifying Atwood part number 31501 or 33488
and installed and operated in strict compliance with the Fenwal
installation instructions. This warranty does not extend to the
furnace or the furnace components.
This warranty shall not apply ifthe Product has been damaged,
modified, abused or altered after the date of purchase.
ANY DEVIATIONS OR OTHER USE VOIDS THE PRODUCT
WARRANTY, VOIDS THE AGENCY LISTINGS OF THE
PRODUCT, VOIDS THE AGENCYLISTINGS OF THE FURNACE, AND CAN BE HAZARDOUS.
DISCLAIMER OF WARRANTIES
FENWAL MAKES NO WARRANTY OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE WITH
RESPECT TO THE PRODUCTS DELIVERED HEREUNDER,
NOR IS THERE ANY OTHER WARRANTY, EXPRESSED OR
IMPLIED, EXCEPT FOR THE WARRANTY DETAILED ABOVE.
IN NO EVENT SHALL FENWAL BE LIABLE TO PURCHASER
OR ANY OTHER PERSON (A) FOR CONSEQUENTIAL, INCIDENTAL OR SPECIAL DAMAGES OR (B) FOR DIRECT DAMAGE, OTHER THAN AS EXPRESSLY SPECIFIED ABOVE.
FENWAL'S AGGREGATE LIABILITY ARISING FROM THE
SALE OF THIS PRODCUCT ORUNDER THIS LIMITED WARRANTY, WHETHER IN TORT, CONTRACT OR OTHERWISE,
SHALL NOT EXCEED THE PRICE PAID BY PURCHASER
FOR THE GOODS SOLD HEREUNDER.
Fenwal is a registered trademark of Kidde-Fenwal, Inc.
Hydro Flame is a trademark of Atwood Mobile Products.
All other trademarks are property of their respective owners.