ONAN 309-0597-03 HIGH EXHAUST TEMPERATURE SWITCH - ONAN Genuine OEM Part
ONAN
- Payment methods
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- SKU:
- ONAN 309-0597-03
- MPN:
- 309-0597-03
- Condition:
- New
- Availability:
- Ships (leaves our warehouse) within next business day if in stock
- Shipping:
- View Shipping Rates


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Description
- Certified Genuine ONAN replacement component for assured compatibility and durability
- Monitors exhaust temperature to prevent overheating and potential engine damage
- Supports safe operation by triggering alerts or shutdowns under high temperature conditions
- Maintains engine health while maximizing fuel efficiency and emissions control
ONAN 309-0597-03 HIGH EXHAUST TEMPERATURE SWITCH – Precision Power Protection from ONAN
This high exhaust temperature switch is an essential safeguard for your ONAN generator, ensuring overheating is detected promptly to avoid costly failures. Expertly manufactured for seamless integration, it delivers confidence in performance whether in RVs, residential backup, or commercial generator systems. Protect your investment with this vital component and keep power flowing without interruptions.
Experience the confidence of authentic ONAN protection
- Original OEM part engineered to exact Cummins/ONAN standards for perfect fit and function
- Enhances generator longevity by preventing thermal damage during demanding operation
- Ensures compliance with safety regulations and preserves warranty coverage
- Reliable switching action that supports precise temperature monitoring and control
- Improves overall system stability, minimizing forced downtime and repair costs
Details
Category: Temperature Switches
Product SKU: ONAN 309-0597-03
Our knowledgeable team is always ready to help you select the right parts for your Cummins/ONAN generator system. Feel free to reach out through our help center for guidance tailored to your specific needs. We are committed to supporting your purchase with clear advice and ensuring your repair or maintenance process goes smoothly for dependable power every time.
Returns Information
You may return new, non-used, and unopened items within 30 days of delivery date under a 20% re-stocking fee in case you do not need it anymore or you have ordered a wrong item.
We cannot accept any returns on "Pumps, Motors, Electrical Items & Transmissions" whether the product is used or new, however in rare cases we may allow an exception under a 40% re-stocking fee.
If you need to return an item, please go to our chat located in the lower right corner, select the option “Returns” and follow the steps to submit your request. Please have on your hands pictures of the item, they will be requested. You will shortly receive an answer from our Customer Service Team providing authorization and return instructions. Likewise, if an exception cannot be authorized, you will receive an answer from us. No returns will be accepted in our warehouse without an RMA number (Return Merchandise Authorization).
All return shipping costs are on customer's responsibility and will not be refundable.
Returns are inspected once they arrive. If the inspection determines that the items are used, non-resellable condition, or damaged, the return will be denied and the customer will be contacted to ship the parts back at the customers' request and cost.
Cancellations
You may cancel your order, in whole or in part, only if the part is backordered and it isn't ready to ship. Once an order has been shipped, sent from the supplier to our warehouse, or in the dispatch line, we cannot cancel it. If your order is shipped, you will need to follow our return policy to return the items you no longer want.
If you need to cancel an order or item for any reason, you may submit a cancellation request directly through your account to the "more options" section or contact us by live chat. All the cancellation requests are evaluated before its approval. If you submit a cancellation request out of business hours, on a weekend or holiday, it will be processed on the next available business day.
Please allow for the cancellation to be confirmed, and check your account for updates on the status. The cancellation process usually takes 24-48 hours to be confirmed by email. We will process your cancellation request and issue a refund to your original payment method.
In the event that an item becomes no longer available (NLA), we will cancel it from your order and ship the remaining items to you. We will send you an email notification if we cancel any part of your order.
Some products may contain chemicals known to the State of California to cause cancer or reproductive harm. ⚠️ WARNING: www.P65Warnings.ca.gov