SolomonMan
New Member
All,
I have a Takagi TK1 that has been installed in my family home since I believe just before 2000. My late dad installed the unit and for the most part the unit has been fairly reliable. On occassion I would have to cycle its power. On occassion meaning maybe once every year or so max.
Anyways, last night while the wife was getting a shower the tank cutout and no hot water was available. I turned off power to the unit and turn it back on from the external power switch that was installed during its installation almost 14 yrs back.
Still no hot water. So after a series of steps (power cycling, flushing the system at the tank, turning on multiple hot water outlets) that usually corrected the hot water issues in the past we still have no hot water.
So I have electronic experience, am a engineer, and grew up in the trades....so I pulled out my multimeter and began to probe and compare on what information I could find on the unit.
The unit when a hot water outlet is turned on will engage the fan blower always. There are no errror codes(probably due to power cycling but no errors are reported though during testing/now). The GFI is not lit up (meaning its working). The red light on main board is on as it is during normal operation. No ignition nor gas solenoid noises at all.
I have done the following;
1) Tested voltage at the igniter (0 volts). Also the connector at board still 0.
2) There is continuity at the hi-limit switch.
3) Opened up burner containment area and check igniter contacts clean very little signs of burnt/corrision (surprised)
4) Inside the burner area confirmed flame sensor is clean.
5) Test GFI to confirm proper operation (No light = on/light on is Off)
6) Did a visual inspection on main board and it looks clean no raised caps nor unusual burn areas.
7) Removed calcificiation clean out tap to see if build up or filter clogged - very very little considering ~14 yrs of use.
8) Natural Gas in house currently runs 120000 BTU furnace plus other gas items in home (all of which have been there well over 20 yrs) so would be very surprised if gas supply was issue.
9) Water pressure is strong but is cold. (before tank, after tank, and at outlets) (In city supply)
I am kind outta of ideas....I need to know the normal firing process of the heater and or more troubleshooting steps.....Something must be preventing ignition...
But I am assuming here the igniter will be first step followed by gas solenoid opening and ignition occurs followed by flame sensor telling the computer to cutout igniter. I am also assuming that the flow process is fine as the fan is always coming on when a hot water outlet is opened and the other items in the parts list seems after the point of ignition. (This is going from no manual other than installation/troubleshooting manual that came with unit = limited knowledge)
If anyone can lend some troubleshooting steps or other things to check please let me know....If anyone has a suggestion on a new water heater I would be interested in seeing what a newer model may provide as well.
Thanks
Chris
I have a Takagi TK1 that has been installed in my family home since I believe just before 2000. My late dad installed the unit and for the most part the unit has been fairly reliable. On occassion I would have to cycle its power. On occassion meaning maybe once every year or so max.
Anyways, last night while the wife was getting a shower the tank cutout and no hot water was available. I turned off power to the unit and turn it back on from the external power switch that was installed during its installation almost 14 yrs back.
Still no hot water. So after a series of steps (power cycling, flushing the system at the tank, turning on multiple hot water outlets) that usually corrected the hot water issues in the past we still have no hot water.
So I have electronic experience, am a engineer, and grew up in the trades....so I pulled out my multimeter and began to probe and compare on what information I could find on the unit.
The unit when a hot water outlet is turned on will engage the fan blower always. There are no errror codes(probably due to power cycling but no errors are reported though during testing/now). The GFI is not lit up (meaning its working). The red light on main board is on as it is during normal operation. No ignition nor gas solenoid noises at all.
I have done the following;
1) Tested voltage at the igniter (0 volts). Also the connector at board still 0.
2) There is continuity at the hi-limit switch.
3) Opened up burner containment area and check igniter contacts clean very little signs of burnt/corrision (surprised)
4) Inside the burner area confirmed flame sensor is clean.
5) Test GFI to confirm proper operation (No light = on/light on is Off)
6) Did a visual inspection on main board and it looks clean no raised caps nor unusual burn areas.
7) Removed calcificiation clean out tap to see if build up or filter clogged - very very little considering ~14 yrs of use.
8) Natural Gas in house currently runs 120000 BTU furnace plus other gas items in home (all of which have been there well over 20 yrs) so would be very surprised if gas supply was issue.
9) Water pressure is strong but is cold. (before tank, after tank, and at outlets) (In city supply)
I am kind outta of ideas....I need to know the normal firing process of the heater and or more troubleshooting steps.....Something must be preventing ignition...
But I am assuming here the igniter will be first step followed by gas solenoid opening and ignition occurs followed by flame sensor telling the computer to cutout igniter. I am also assuming that the flow process is fine as the fan is always coming on when a hot water outlet is opened and the other items in the parts list seems after the point of ignition. (This is going from no manual other than installation/troubleshooting manual that came with unit = limited knowledge)
If anyone can lend some troubleshooting steps or other things to check please let me know....If anyone has a suggestion on a new water heater I would be interested in seeing what a newer model may provide as well.
Thanks
Chris