Troubleshooting Guide, No power to humidifier

TROUBLESHOOTING Guide

If a problem arises with the Aprilaire Model 800 Steam Humidifier, please review the following troubleshooting guide for possible causes and solutions.. If the problem persists, call Aprilaire Tech Support toll-free at 1-800-334-6011.. Please be prepared to describe the exact nature of the problem..

TABLE 5 – Troubleshooting Guide

Problem

Possible cause

Action

Humidifier does	No power to humidifier	• Check main power supply.
not energize; steam		• Check main line safety switch.
canister does not		• Verify terminal block electrical connections.
heat up, display		• Verify terminal block electrical connections.
heat up, display		• Verify humidifier is turned on.
lights not on		• Verify humidifier is turned on.
lights not on
	No power to low voltage	• Check for proper supply voltage.
	control circuit	• Verify terminal block electrical connections.
		• Check for control circuit voltage, 24 VAC.

	Control terminals	• Check if auxiliary limit controls are not allowing system to operate, e.g., high limit
	are open	humidistat, airflow proving switch, etc.. Reset, replace, or calibrate as needed..

	ADHC faults:	• Check terminals for 24 VAC.
	• Open, shorted,	• Check control circuit wiring.
	or incorrect wiring
	of control

Steam canister failure	Improper wiring	• Verify proper electrical connections.

	Mineral buildup	• Inspect steam canister for severe mineral buildup on or around electrodes. If severe
	on steam canister	mineral buildup is present, replace steam canister..
	electrodes

	Steam canister electrode	• Inspect electrodes for surface corrosion or pitting. This is usually caused by a high
	corrosion	chloride level in the supply water.. Replace steam canister..

Unit does not fill	No water supply to	• Verify that manual water supply valve is open and that pressure exists.
with water	fill valve	• Check if in-line strainer in inlet port of fill valve is plugged. Clean strainer or replace.

	Unit control is not on	• Press On/Off switch.

	Malfunctioning fill valve	• If fill valve does not open:
		– Check for obstruction in valve..
		– Verify fill valve electrical connections..
		– Verify proper 24 VAC to fill valve.. If voltage is present and valve does not open,
		replace valve..

	Drain valve is open	• Check for obstruction in drain valve.

Fill valve does	Malfunctioning level	• Check that high water sensor electrical plug is fully engaged.
not close	control system

	Fill valve is stuck	• Check if there is an obstruction that does not allow valve to seat properly. Clean or
		replace valve as needed..

	Drain valve is open	• Clean or replace drain valve if an obstruction in the valve does not allow complete
		closure..

800 specifications

The Aprilaire 800, a highly efficient whole-home humidifier, is designed to enhance indoor air quality and comfort. As part of Aprilaire's renowned line of whole-home products, this system excels in maintaining optimal humidity levels, mitigating health issues related to dry air, and protecting the integrity of your home.

One of the standout features of the Aprilaire 800 is its impressive capacity to deliver significant moisture output—up to 18 gallons per day. This output is ideal for larger homes, ensuring that every room receives adequate humidity. The unit is particularly effective in combating the adverse effects of dry air during winter months when indoor heating can lead to discomfort and increased susceptibility to respiratory issues.

The Aprilaire 800 employs advanced technology, specifically the use of a self-regulating humidifier design that operates independently of your heating system. This means it can maintain humidity levels even when the furnace is not in use. The unit showcases a built-in digital control, allowing homeowners to set and monitor humidity levels easily. The device can also integrate seamlessly with most HVAC systems, enhancing its versatility.

Another notable characteristic of the Aprilaire 800 is its unique water panel design. The patented self-cleaning feature helps reduce mineral buildup, ensuring optimal performance and longevity. This means that maintenance is simplified, requiring minimal intervention to keep the unit functioning at peak efficiency.

Furthermore, the unit can be connected to a water line for continuous operation, eliminating the need for manual refills. This feature not only adds convenience but also ensures a consistent supply of moisture throughout your home.

Energy efficiency is a key consideration in the design of the Aprilaire 800. Its operation is tailored to minimize energy consumption while maximizing moisture output, making it an environmentally friendly choice for maintaining indoor comfort.

In summary, the Aprilaire 800 whole-home humidifier combines high capacity, advanced technology, ease of use, and energy efficiency. It is an ideal solution for homeowners looking to improve their indoor air quality, comfort, and overall well-being during dry seasons. Whether you are dealing with dry skin, respiratory issues, or damage to wooden furniture, the Aprilaire 800 can be a valuable addition to your home.

Aprilaire 800 Troubleshooting Guide, No power to humidifier, Malfunctioning fill valve

Models: 800