I. TROUBLE SHOOTING
Digital Controller
Refer to the OVERVIEW OF THE DIGITAL CONTROLLER on page 89.
Lack of Heat in Building
1) Check and confirm thermostat function. 2) Check and confirm power supply and circuit breaker. 3) Check and confirm pump operation.
4) Check and confirm supply water flow by determining if the pipes are hot when the pump activated. Check the pipes in the house, not at the GARN® unit. If pipes are not hot and the pump is activated, the pipes may be “air bound’, a manual valve is set in the shut position or a solenoid valve is inoperable. Call your dealer and shut off your thermostat. 5) Check and confirm the supply water temperature. The minimum supply water temperature: for forced air systems should be 125°F; for radiant floor systems approximately 90°F - 125°F; for baseboard radiation or radiator systems 130°F -145°F. If the supply water temperature is inadequate, heat will not be delivered even though supply water flow is adequate. 6) If all of the above checks out and heat is still not getting to the building, call your dealer.
Draft Inducer Fails to Operate
1) If the draft inducer motor does not activate, check and confirm: • Status of the power supply, circuit breaker, etc of the circuit feeding the GARN® controls. • That the electrical plug for the motor is pushed all the way into the electrical socket. 2) If the motor stills does not activate pull the electrical plug and insert another electric device in the same outlet and activate the controller. If this device operates properly, then the motor is defective. If this device does not operate, then there is a problem with the digital controller. Call your dealer or DECTRA. 3) If everything above checks out, then visually check the water level in the GARN® unit. If the water level appears low and adding water corrects the condition (motor operates), then Low Water Indicator light is burned out. If the water is not low, or if adding water does not correct the condition, then the float switch is defective. Call your dealer. Noisy Blower Wheel If the draft inducer operates noisily, check and confirm that all of the mounting bolts are not loose and that the gasket is in good condition. If the bolts are loose tighten until snug ( do not over tighten). If this does not solve the problem, the noise may be the result of: 1) Blow out the motor housing with compressed air. The noise could be a result of dirty windings or bearings in the blower. 2) Ash, wood debris or paper kindling that has been pulled through the heater exchanger and is stuck in the blades of the blower wheel creating an imbalance. Ash will normally disintegrate, debris and paper
GARN WHS 1000 and WHS 2000 Manual © HY-C Company LLC - September 2024
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