A 1990 utica mgb-1002h boiler wouldn't shut down at the high temp limit with the old aquastat. Basement was partially flooded due to the boiler's over pressure valve releasing hot water into the basement for unknown amount of time. Thank goodness that safety device worked, despite the wet mess.
It was difficult to locate the old Aquastat's part number. The old p/n was marked L8148E1216 in blue ink on the inner underside of the steel housing near the transformer. Honeywell/Resideo cross referenced this new 1265 with the old 1216 p/n.
Resideo is the new brand name for Honeywell's residential products.
Replacement steps were fairly straightforward. I verified that the high limit worked properly at my desired setting of 180 deg F for 3 full cylces.
Once the aquastat was replaced, the boiler worked like it is supposed to.
| Brand | Honeywell |
|---|---|
| Model Name | Honeywell |
| Special Feature | Easy to Install |
| Item Weight | 1.81 Kilograms |
| Voltage | 120 Volts |
| Shape | Rectangular |
| Control Type | Remote Control |
| Control Method | Remote |
| Style | Protection |
| Backlight | No |
| Wattage | 40 |
| Brand Name | Honeywell |
| Model Info | L8148E1265 |
| Item Weight | 3.98 pounds |
| Product Dimensions | 4.8 x 4.7 x 6.6 inches |
| Item model number | L8148E1265 |
| Is Discontinued By Manufacturer | No |
| Part Number | L8148E1265 |
| Special Features | Easy to Install |
| Batteries Included? | No |
| Batteries Required? | No |
| Thickness | 1 Inches |
