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Stream33 offers high quality plumbing products priced right. From bathroom and kitchen products to pre-assembled installation kits and behind-the-wall products, you can count on Stream33 for convenience, quality and value.Learn More
Breeze33 offers high quality HVAC and air distribution products that are priced right. From mini split systems to room air conditioners and dehumidifiers and registers, you can count on Breeze33 for convenience, quality and value.Learn More
Craft33 offers high quality all-wood cabinetry that is priced right. Styles from transitional to modern and traditional, you can count on Craft33 cabinets to compliment your clients’ lifestyle and budget.Learn More
Bright33 offers high quality LED lighting products priced right. Discover indoor and outdoor LED lighting options from undercabinet to ceiling and vanity, you can trust Bright33 for convenience, quality and value.Learn More
Famous Supply has over 45,000 products in stock with experts to serve the residential, commercial, institutional & industrial markets.Learn More
Find solutions tailored to meet your professional plumbing, HVAC, and building company needs. We offer a wide range of programs and services to help customers streamline daily operations. See what Famous Supply can do for you.Learn More
With 31 Famous Supply locations in Ohio, western Pennsylvania, and West Virginia, your local Famous counter has everything you need to help you get your project done. Famous’ greatest asset is our quality Associates dedicated to serving you, our valued customer!
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With over 45,000 SKUs in stock, Famous Supply specialized in HVAC, plumbing, industrial, building products, and training. We sell into the residential, commercial and industrial market segments for new construction, replacement, repair, remodel, parts and service.Learn More
Famous Supply can help you with specifications, product options at various price points, design, layout, scheduling and coordination of your project from A to Z. We are your one-stop shop for HVAC, plumbing, cabinets, countertops, appliances, lighting, windows and doors.Learn More
November 1, 2015 Jeff Rosenblum
First generation smart valves act as ignition controls and gas valves. There are internal and external safeties that can prevent the valve from working properly. As the valve operates on a 24V signal from a blower control or thermostat, diagnosing these valves is relatively simple.
The smart valve 1 has a 4 pin Molex plug that attaches to the top or side of the control. This 4 pin plug houses 4 wires: a 24V hot, 24V common, electronic fan timer output, and a 24V input from the pressure switch (see diagram below). You should find 24V present between the 24V hot and common at all times when power is applied to the furnace. With a call for heat, the blower control will energize the induced draft blower, which will close the pressure switch. When the normally open pressure switch closes, 24V will be introduced to the pressure switch wire at the valve. This allows the furnace to attempt to light the pilot. After ignition has occurred, the valve will send a 24V signal back out on the EFT terminal to energize the blower motor.
If the pilot light will not light, verify voltage to the pressure switch terminal and the 24V hot terminal. Check for voltage to the igniter with the igniter plug still attached to the valve. If the pilot will light but not the main burners, check flame sense to the valve. Verify that the pilot tubing is securely attached to the valve.
16 Years Industry Experience
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