Best Water Heater Temperature Gauges: Honeywell RWD14A Aquastat Relay vs Johnson Controls A19ABC-1C Aquastat Controller

The two best water heater temperature gauges are the Honeywell RWD14A Aquastat Relay and the Johnson Controls A19ABC-1C Aquastat Controller. They are both highly rated on Amazon with 4.6 stars (out of 5) and 4.5 stars (out of 5), respectively. They are also both very affordable, with the Honeywell model costing $39.95 and the Johnson Controls model costing $49.95.

Both the Honeywell and Johnson Controls models are highly accurate, with a +/- 1 degree Fahrenheit margin of error. They are both easy to install, with clear instructions included in the packaging. They are also both compatible with a wide range of water heaters, making them a good choice for almost any home.

The main difference between the two models is that the Honeywell model has a built-in relay, while the Johnson Controls model does not. This means that the Honeywell model can be used to control other devices, such as a pump, based on the water temperature. The Johnson Controls model can only be used to measure the water temperature.

Both the Honeywell and Johnson Controls models come with a one-year warranty.

Pros:
– Highly accurate
– Easy to install
– Compatible with a wide range of water heaters
– Affordable

Cons:

– The Honeywell model does not come with a built-in relay, while the Johnson Controls model does. This means that the Honeywell model can only be used to measure the water temperature, while the Johnson Controls model can be used to control other devices, such as a pump, based on the water temperature.