A Lochinvar 100233695 Bulbwell isolates and secures a sensing element for accurate temperature response within the climate-control setup.
The bulbwell creates a protected mounting point for a temperature-sensing bulb, allowing the HVAC system to measure fluid or vessel temperature accurately without exposing the sensor directly to system pressure or flow. Its threaded 3/8" NPT design matters because it supports a secure, leak-resistant fit and dependable thermal contact, which is essential for stable control and safe operation in heating and cooling equipment.
The bulbwell might be nearing replacement if the heating and cooling unit shows inaccurate temperature readings, erratic cycling or delayed response from the sensing bulb during normal operation. Common indicators include corrosion, thread wear, leakage around the connection or damage from moisture, scale, vibration or repeated temperature changes that can reduce sealing and thermal transfer.
Parts Town offers same-day shipping on in-stock real OEM HVAC parts Monday through Friday until 9 PM ET and on Saturday until 4 PM ET for online air orders. With updated inventory and efficient processing, we can ship orders as quickly as possible. View shipping details on your real OEM heating and cooling replacement parts by visiting our Track My Order page and submitting your order number or purchase order (PO) number with your zip code. We make real-time delivery updates easily accessible so you're always informed on how your shipment is progressing. Parts Town has a wide range of customer support options for real OEM HVAC parts 8 AM—9 PM ET Monday—Friday via chat, email, phone and more. Visit our Contact Us page to learn how to reach a team member with any questions you might have. Yes! Parts Town allows you to return most new, unopened real OEM HVAC parts within 90 days of delivery, so visit our Returns page for more details. If the order came from a third-party seller, their return policy will apply.Read More FAQs
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