Photo may vary slightly — verify by part number before ordering.62P503B02 — WaterFurnace COAX C-5233-4 BTSSN-24
WaterFurnace has discontinued part 62P503B02.
Replaced by: 62P593-02
Order replacement 62P593-02 — contact us →Overview
WaterFurnace 62P503B02 — COAX C-5233-4 BTSSN-24. A heat exchanger transfers heat between the refrigerant and the water loop; coaxial and brazed-plate types are used in water-source heat pumps.
Discontinued — replaced by 62P593-02. WaterFurnace no longer supplies 62P503B02; order the direct factory replacement 62P593-02 instead.
Fits these WaterFurnace units: ATV022D100NLT, P022TL101NADSSA, RJSH015ER201NBNV53SSA (3 models; the Fits These Units list below is complete). These are the units we've confirmed — not necessarily the only ones. Send us the model and serial number if yours isn't listed.
Genuine WaterFurnace OEM part — not an aftermarket substitute.
What is WaterFurnace 62P503B02?
It is a genuine WaterFurnace OEM heat exchanger, listed by WaterFurnace as “COAX C-5233-4 BTSSN-24”.
Which WaterFurnace units use 62P503B02?
Confirmed fits include ATV022D100NLT, P022TL101NADSSA, RJSH015ER201NBNV53SSA. The Fits These Units list on this page shows all 3 confirmed models.
Is 62P503B02 still available?
Discontinued — replaced by 62P593-02. WaterFurnace no longer supplies 62P503B02; order the direct factory replacement 62P593-02 instead.
What are the signs a heat exchanger has failed?
A failing heat exchanger may leak, foul or scale, or lose capacity; a leak between the refrigerant and water circuits needs qualified service.
Is 62P503B02 a genuine WaterFurnace part?
Yes. 62P503B02 is WaterFurnace's own part number for this item, and this is a genuine OEM part, not an aftermarket substitute. Search or order by this number.
How do I confirm 62P503B02 fits my unit?
Match the part number on your original part, or check your unit's model against the Fits These Units list on this page. Not sure? Send us the model and serial number and we'll confirm before you order.
Fits These Units
Confirmed to fit the WaterFurnace units below — and these are not the only models this part fits. Contact us for the entire compatibility list, or if you don't see your unit, send the model and serial and we'll confirm before you buy.
- ATV022D100NLT
- P022TL101NADSSA
- RJSH015ER201NBNV53SSA
Specifications
| Part Type | Heat exchanger |
|---|---|
| Qty per Unit | 1 |
| Condition | New — Factory OEM |
| Availability | Discontinued |
Ask the Parts Desk
Not sure this fits? Need more than what's in stock? Send the model and serial from the unit's data plate — a real person reads it and confirms before you order.
Common Questions
Is the stock number on this page real?
Yes — it's the live count from our own shelf, not an availability estimate. If it says 1, that's how many are physically here. When it hits zero, this page says so.
Is this a genuine WaterFurnace part, or aftermarket?
Genuine WaterFurnace OEM equipment sourced through WaterFurnace's authorized parts program — not an aftermarket substitute.
How do I confirm this fits my unit?
Match part number 62P503B02 to your unit's parts diagram. If unsure, send us your model and serial number and we'll verify before you order.
What's the warranty on this part?
Warranty terms vary by manufacturer. Contact us with your order number for details specific to this part.
How fast does this ship?
In-stock items ship the same business day on orders placed before 1pm ET, Monday–Friday. Standard ground delivers to most of the continental US in 2–5 business days. Ships via UPS/FedEx Ground, or truck freight for oversized items. $15 flat-rate shipping, free on US orders of $50+.
Does everything ship UPS or FedEx Ground?
Most orders ship UPS or FedEx Ground. A small number of large or heavy parts across the catalog ship by truck freight instead, and we reach out to arrange a delivery window before those orders leave the warehouse. Oversized items that ship by truck freight are also covered by free standard shipping on orders of $50 or more.
More parts in WaterFurnace ATV022D100NLT Parts
