Red Dot Heater Core (254/256) | RD-1-0355-0P
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You have 30 days to request a return. All sale items are final sale.
Red Dot RD-1-0355-0P Heater Core
Red Dot RD-1-0355-0P is the replacement heater core cataloged as 76R1100 for compatible R-254-0, R-256 and R-290-0 heater units.
Manufacturer part #: RD-1-0355-0P
Sold as: EA
Key Features & Specifications
- Core fin dimensions: 6 inches high × 6 inches long × 1-7/8 inches thick.
- Inlet and outlet nipples: 5/8-inch outside diameter.
- Red Dot catalog cross-reference: 76R1100.
Compatibility & Use
Confirm the complete heater model and suffix. The related R-254-1 core has a different connection size, so the family name alone is not sufficient.
Installation & Replacement
Let the coolant system cool and depressurize before draining or disconnecting hoses. Inspect hoses and clamps, then refill, bleed and check for leaks according to the heater and cooling-system instructions.
Parts Desk Insight
Red Dot’s dimensions describe the finned core, not the overall envelope including tubes. Compare tube orientation and mounting clearances before installation.
Manufacturer Resources
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.