When the temperature rises to the thermostat setpoint, the switch inside the thermostat "makes" contact and turns on the cooling. AllSponsored Content is supplied by the advertising company. High limit, low limit and circulator control are all separate functions of single-function aquastats. 0000003372 00000 n
WebOverfilling can result in leakage, electronic failure, electrical hazard or damage to the Double check that the boiler is not off on safety. Do a tap test. There is no definitive answer to this question as the only way to truly know if an aquastat is bad is to test it. Or see AQUASTAT DIAGNOSTIC FAQs-1 - more-recently-posted questions and answers about diagnosing an repairing heating boiler aquastat problems. The Company is not responsible for the privacy practices of the content of those linked websites. I tried turning on and offthe main power switch to see if it would reset but no dice. The older tanks are developed from steel. However, the best solution is to engage a plumber who can assess the problem well and fix it professionally and determine whether you must replace the tank or repair it. The cost can vary depending on different factors. Have your service tech troubleshoot the aquastat, as well as the zone 1 relay. You can't tell if the coil is bad until you get the burner firing for DHW. If the burner was firing, maintaining temperature, and no hot water, then you could check to see if it's leaking or plugged. 0000010212 00000 n
Models are available with sweat or flare connections, and for normally open or normally closed operation. A gray sticky substance called conductive compound is often put in the well along with the bulb to assure heat transfer. Diverting valves operate the same way, except that the ball closes the alternate port when the valve opens. BUT if your system is wired as they usually are in the U.S., it is the heating boiler temperature that is sensed by the aquastat on the boiler (not on the indirect fired water heater tank) that turns the burner on and off. An aquastat is just a switch that turns the boiler on and off to maintain the right water temperature. If power is applied to the zone valve and it does not open, replace the motor or the head. Steel tanks usually combine air and water inside to maintain pressure.