Taco SR503-4 Zoning Control, 3 Zone, 1/3 HP per Zone, 6 per Zone Full Load Amps at 120 VAC

Taco SR503-4 Zoning — Taco SR503-4 Zoning Control, 3 Zone, 1/3 HP per Zone, 6 per Zone Full Load Amps at 120 VAC

The Taco SR503-4 Zoning (manufacturer part SR503-4) is a genuine OEM HVAC component available at Cedars HVAC, your trusted source for heating, cooling, and refrigeration parts. We stock this HVAC component for fast nationwide shipping direct from the distribution center, so contractors, facility managers, and homeowners can get the exact replacement they need without delay.

Product details

The TACO 3 zone switching relay’s layout helps make short work of most jobs. Its snap-in PC board easily replaces any zone-switching relay without replacing or rewiring the entire box. Uses a standard “ice cube” replaceable relay that is compatible with conventional and programmable thermostats. Features external lights to provide instant diagnostic feedback.

Why buy from Cedars HVAC

• Genuine OEM HVAC parts — not aftermarket substitutes
• Contractor-friendly pricing on every HVAC component
• Fast nationwide shipping direct from the distribution center
• Real HVAC expertise — email us at [email protected] if you need help confirming compatibility
• Financing available at checkout

About this part

This Taco SR503-4 Zoning is part of our Controls catalog. Contact us if you need help identifying compatible models or sourcing volume quantities. For installation guidance, always refer to the manufacturer documentation and consult a licensed HVAC technician where required.

Shipping and returns

Most Taco SR503-4 Zoning orders ship within 6–8 business days direct from the distribution center. Standard ground shipping covers the continental United States, and expedited options are available at checkout. Returns are accepted within 30 days on unopened, uninstalled parts — see our return policy for full details. International shipping is available on request; contact our team for a quote.

Frequently asked questions

Is this part new and in stock? Yes, we list only in-stock items. The Taco SR503-4 Zoning ships direct from the distribution center within 6–8 business days.

Will this HVAC component fit my equipment? Compatibility depends on the model and revision of your existing equipment. If you need help confirming fitment for the Taco SR503-4 Zoning, email us at [email protected] with your unit model number and we will confirm before you order.

Can I get a contractor or wholesale discount? Yes. Cedars HVAC offers volume pricing for licensed HVAC contractors, property managers, and resellers. Request contractor pricing or call us to set up an account.

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