I had the same problem with my Honeywell HZ-519 but after cutting a hole in the back, opposite the control panel, I found the wiring burnt out at the female connector to the element. I replaced the female connnector and rewired it to the anti tip switch.
I found a unique way of fixing my HZ519 baseboard heater, i tried the banging on it when it wouldnt work as suggested in this thread and saw sparks inside, i have no star driver so i flipped the heater over and took a hammer and poped a hole in the plastic underneath the controls and what do you know there was a wire hanging off so i replace it and a pendulum weight type anti flip switch which was hung up so i righted it and flipped over the heater and hit the power and ahhhhh warmth... old fashion redneck git r done. good luck all...
I have an HZ519 that stopped working as well. I found that the anti tip switch is in fact a mechanical weight type if switch and not a mercury switch. The problem I'm having is that the plastic stud that the anti tip switch mounts to is melting causing the switch to come loose and fall to the bottom of the heater and therefore stop working properly depending upon the position the switch is in when it lands.
Does anyone know if Honeywell has a retrofit for this problem?
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Re: wont heat up
Anti-tip switches are pretty much a mercury type. self reset when the unit is upright. current path is from one side of the line to the thermostat. other thermostat to an internal oveload, from the overload to the anti-tip switch. other side of the switch to the element. neutral connects to other heater element wire[terminal]
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unplug the heater. remove the screws holding the control panel, pull the control out from the body of the heater enough to get the probes of an ohmmeter onto the connections that lead to the heating element. the ohmmeter should read less than 100 ohms. if the ohmmeter reads infinite ohms (open circuit), the heating element or the connections to it ate bad. if the heating element is bad, cheaper to buy a new heater. if the heating element is okay, repair connections or control.
there is ussualy a small thumb screw in the feed pipe to the unit in qestion, just loosen it and let air and some water out. or on your boiler there will be a bleed vave sometimes there is evemn an auto vent valve
I do believe that there should be a tip switch under the feet and if it is broke off then you need to by pass the switch. You could use a small piece of dowel rod up inside to trip the switch and have heat.
Go to honeywell.com
Under red welcome sign
Bottom red highlighted box literature/image search
Type in thermostat model number
Click on arrow to right
Then click on the PDF files owners manual / installation instructions
If you can’t find what you want, the bottom left and bottom of web
Page, they have homeowners assistance and Home products to get the help you need.
Just fixed one, you will need a T-15tr driver, which is a security torx screw remover. Open back cover behind controls, check for
any lose wires. Heating element wire had become disconnected on the one I repaired. P.S. you will need an extension for the bit if it is just the bit, and not a screw driver.
I have this model heater and it quit working as well. I took it apart to find that the plastic bosses that the safety switch mounts/screws to melted and the switch fell into the bottom of the heater rendering the heater useless.
FYI, The safety switch removes power from the heater when the heater is laying on it's front or back incase it gets knocked over while it is on.
This is a serious defect. These heaters should be recalled.