Mr. Heater MHT 45 owner manual Troubleshooting, Blower does not Come on, Igniter does not Spark

Page 20

Section 7 TROUBLESHOOTING

General

This troubleshooting quide has been designed to assist you in locating and correcting minor problems that may occur with the MHT tube heater.

BLOWER DOES NOT COME ON

Possible Cause

 

Try This….

 

 

 

Power cord is not plugged in.

 

Plug power cord into a grounded three prong Outlet.

 

 

 

Thermostat setting is too low.

 

Increase thermostat temperature setting.

 

 

 

DSI module needs to be reset.

 

Unplug heater power cord from the electrical Outlet: wait for a

minimum of five seconds. Plug heater cord back

into outlet.

 

 

 

 

No power at electrical outlet.

 

Replace fuse or reset circuit breaker

 

 

 

Faulty blower motor

 

Replace blower motor.

 

 

 

IGNITER DOES NOT SPARK

Possible Cause

Try This…..

 

 

DSI module needs to be reset.

Unplug heater power cord from the electrical outlet: wait for a

 

minimum of five seconds. Plug heater cord back into outlet.

 

 

Faulty igniter or ignition wire.

Unplug heater power cord from the electrical outlet; check igniter and

ignition wire for damage. If damaged, replace igniter and/or ignition

 

 

cable.

 

 

Air switch does not operate.

Check flue/air supply duct for obstructions; remove obstructions as

 

required. Check for loose/leaky air hoses to the air switch; repair/

 

replace/tighten hoses as required. Check for 24V across the secondary

 

terminals 4 and 5 (red and yellow wires) of the transformer. IF NO:

 

Check for 120V across the primary terminals 1 and 3 (black and white

 

wires) of the transformer. If 120V is present, replace transformer. If 120V

 

is not present, check wiring between power cord, blower motor and

 

transformer. IF YES: Connect a jumper wire across air switch terminals;

 

if jumper wire allows blower to operate, replace pressure switch (see

 

replacement parts list for part number that applies to your unit rating).

 

 

Igniter spark gap incorrect.

Reset spark gap to 1/8’ (0.125”).

 

 

 

Mr. Heater Gas-Fired Low-Intensity Infrared Heater

20

Operating Instructions and Owner’s Manual

Page 19 Page 21
Image 20
Page 19 Page 21
Contents For Your Safety Contents Available Accessories Before YOU BeginUnpacking the Heater IntroductionAbout The Heater Rear ViewTechnical Specifications Heater SpecificationsVenting Specifications End ViewWhere can the heater be installed? Where can’t the heater be installed?Installer’s responsibility Gas Service Requirements System RequirementsNon-residential Installations GroundingVenting Requirements Venting CodesInstallation Safety EquipmentInstallation Tools Installation MaterialsHorizontal Installations Tilted InstallationsGeneral Guidelines Residential Minimum Required Safe Distances from CombustiblesHorizontal Installation Tilted InstallationHang the Heater Heater OrientationMHT Heater Assembly Instructions Typical Installation Venting Canadian Installations1 US Installations2This section Requirements of your local gas supplierBasic Flue Venting Residential Only Vertical Through the RoofHorizontal Through the Sidewall Venting/DuctingRoof Pitch Min Horizontal Venting Vertical VentingSingle Wall Double WallAir For Combustion Residential Outside Combustion Air SupplyDirect Outside Air For Combustion Residential Vertical VentingElectrical Service Installation Gas Service InstallationInstall Gas Supply Lines System RequirementsSupplied by others OperationUse LP-resistant joint compound on all threads Proper Operating Flame Maintenance Pre-Season MaintenanceOperation of the Heater Igniter does not Spark TroubleshootingBlower does not Come on Burner does not Light Burner does not Stay LITHST-35 HST-45 Illustrated PartsIllustrated Parts Mr. Heater Model #MHT 45 Tube Heater Model # MHT

MHT 45 specifications

The Mr. Heater MHT 45 is a versatile and powerful heating solution designed for both residential and commercial spaces. This portable propane heater stands out in the market due to its efficient heating capabilities and user-friendly features, making it ideal for workshops, garages, and outdoor activities.

One of the standout features of the MHT 45 is its robust heating output. It can deliver an impressive 45,000 BTUs, ensuring that even larger spaces are heated quickly and effectively. This high output is particularly beneficial during colder months, where rapid warmth is essential for comfort and productivity. The heater offers a heating range of up to 1,000 square feet, making it suitable for various applications, whether in the home or on the job site.

The MHT 45 utilizes advanced radiant heating technology, providing even warmth without requiring a fan. This technology allows for silent operation, making it an excellent option for noise-sensitive environments. Additionally, the radiant heat minimizes air movement and helps maintain humidity levels, creating a comfortable atmosphere while reducing dust and allergens in the air.

Another noteworthy characteristic is its portability. The MHT 45 comes equipped with a sturdy handle, allowing for easy transport between locations. This makes it a favorite among tradespeople who need efficient heat in different work areas or outdoor enthusiasts who want comfort while camping or tailgating.

Safety features are abundant in the Mr. Heater MHT 45. It includes an automatic shut-off system, which activates if the heater tips over, ensuring user safety. The built-in oxygen depletion sensor automatically turns the heater off if it detects low oxygen levels in the surrounding environment, providing peace of mind while operating.

The heater runs on a 20-pound propane tank, providing a substantial amount of heating time before needing a refill. This efficiency means users can rely on the MHT 45 for extended periods without frequent interruptions.

In summary, the Mr. Heater MHT 45 is a powerful propane heater packed with features that cater to both indoor and outdoor heating needs. With its high BTU output, silent operation, portability, and extensive safety measures, it represents a reliable choice for anyone looking to stay warm in various settings. Whether for personal use or demanding job sites, the MHT 45 is engineered to deliver comfort and convenience.
Top Page Image Contents