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140-240F AquaStat Relay w/ Vent Damper Connection, L8148E1257
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L8148E1257 has been discontinued
Discontinued February 10, 2026
This product was discontinued by the manufacturer.
MANUALS (1)
Suggested Alternative:
High Limit Vertical Mount Aquastat Relay, 15-Degree (F) Differential, L8148E1265
Product Highlights
–
Fixed
SPST
Vertical
140°F to 240°F
240°F Max Temp
140°F Min Temp
Description
–
Product Overview:
Immersion-type controllers that combine high limit protection with switching relay control of burner and circulator motors.
Features:
Immersion-type controllers that combine high limit protection with switching relay control of burner and circulator motors.
Features:
- High limit opens burner circuit only.
- Select models include transformer and accessory terminals for adding a remote low limit controller.
- Vertical Mounting Case.
- Requires a 24 Vac thermostat with heat anticipator set at 0.2A.
Specs
–
| Application: | High Limit Low Limit |
|---|---|
| Temperature Range (F): | 140°F to 240°F |
| Mount: | Vertical |
| Differential: | Fixed |
| Max Temp Differential: | 15°F |
| Max Temp (F): | 240°F |
| Min Temp (F): | 140°F |
| Switch Action: | SPST |
Questions?
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Call or text 888-757-4774
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Friday
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Saturday – Sunday
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Product Reviews
4.95 out of 73 reviews
100% would recommend this product
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Showing 1-10 of 73 reviews
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I needed a new control panel
It was a replacement for Honeywell board that went bad after a few years.
AJB
New Jersey
1 years ago
Verified Buyer
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yes
Hard to find part at a good price.
smitty
Ks
2 years ago
Verified Buyer
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Exact Replacement, installed easily.
Well written cut-sheet with easy to follow wiring guides. My circulating pump is back up and running.
Scott
Northern Michigan.
3 years ago
Verified Buyer
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Perfect, easy ordering & quick shipping
Perfect replacement. 20 minute job.
Jas
Northern NJ
3 years ago
Verified Buyer
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Exact fit
My gas boiler is 23 years old and this unit was identical to the one that failed. Made the swap easy. Here's to another 23 years! Received it quickly!
Preferred Steve
Connecticut
4 years ago
Verified Buyer
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Exactly what I needed
The jump wire on the existing aquastat was fickle and sometimes would work and other times wouldn't. It had to be bent just the right way...sometimes there was no way. Ordered the new one from Supply House. Got it quickly. It was identical to the original, jump wire and all. However, before it arrived, I magically bent the jump wire up and to the left and it kicked on the flame in the boiler. It's been running ever since. I'm just going to wait until it acts up again before installing the new part. I'm sure it will be fine.
john espo
bronx, NY
4 years ago
Verified Buyer
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Yes
Good
Mr. Smith
Abington Pa
4 years ago
Verified Buyer
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Great palace to do buisness
I have bought many parts from the suppyhouse they always ship fast and are just what i need. I love there web site its easy to find what you need. And there parts always work geat
Clyde the mechanic
Norton ohio
4 years ago
Verified Buyer
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Direct replacement
I used this item to replace a 10-year-old similar Honeywell aquastat on a boiler. The previous control had failed with the typical Honeywell cold solder joint failure on the board. (Risideo is the new name of Honeywell Residential.) The change-out was quick and easy. Hopefully, Honeywell has the factory QC figured out on this control.
Shipment from Supplyhouse.com was quick and traceable.
Boilerguy
St. Paul, MN
5 years ago
Verified Buyer
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Exact replacement for original Honeywell Aquastat
Exact replacement for original Honeywell Aquastat and it was delivered the next day inside the time range that was stated. Very Happy with transaction.
Joe
Milford, MA
5 years ago
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