TLDR Review: Robertshaw 803A Thermostat
Pros
- •Accurately controls line voltage systems like exhaust or vent fans, especially in simple setups such as swamp coolers or greenhouses.
- •Reliable and consistent operation reported over extended periods, sometimes lasting over a year with steady performance.
- •Handles standard 12olt power supplies without any issues, making it compatible with common household electrical systems.
- •Offers a clear and effective differential between on and off states, providing straightforward temperature control.
- •Constructed with basic betal technology which indicates simplicity and ease of use without overly complex electronics.
- •Functions well for managing heat in areas with multiple heaenerating appliances, keeping temperatures in check.
- •Affordable and practical for those who need a simple thermostat replacement rather than a higech solution.
Cons
- •Product description is misleading; although labeled as a cooling thermostat, it functions primarily as a heating thermostat, causing confusion.
- •Lacks an off mode on the dial, meaning it still activates above 85 degrees rather than fully shutting off.
- •Not suitable for precise cooling control like duct fans, which limits its application for more demanding cooling systems.
- •Some users have experienced inconsistent or unreliable performance, including activation at lowehan-set temperatures and day-to-day variability.
- •Calibration instructions are behind a costly subscription, making troubleshooting and adjustment frustrating or expensive to access.
- •May stop functioning properly after a few weeks in some cases, indicating potential durability concerns.
- •Not as accurate as modern digital thermostats, so its use is best reserved for basic control needs that don’t require exact temperature regulation.
Bottom Line
The Robertshaw 803A Thermostat is a no-frills, line voltage thermostat best suited for basic heating control and simple fan applications where precise temperature accuracy is not critical. However, its misleading labeling as a cooling thermostat and limited functionality — including no off position and potential reliability hiccups — mean you should be cautious if you're planning to use it for fine-tuned cooling systems. If you need more precise or dedicated cooling control, looking into a dedicated digital or cooling-specific thermostat might save frustration in the long run.
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