I had an identical problem that I solved. This damage to the printer is repairable at home.
I do not know why the error 1403, and five flashes of the diode, should signal a problem with the temperature sensor, since the fault lies elsewhere.
Let me start with the fact that you need to remove the printhead. Pull the housing of the printhead and carriage seat toward you, next to the ink tanks, to snap off the plastic arm with the clicks.
Disassemble the head - two silver screws. We remove the rubber pad inside. Below it are micro-holes terminated with flex tape heads. A rubber pad is put on the protruding black tunnels - grooves through which the ink escapes. Blow the head with your mouth. Until we blow out the ink that will be on the metal plates in the form of drops. We clean both sides with the Strong blue preparation, for unclogging the heads, and blow again. Watch out for possible "burns" of the lips with chemical preparations. Do not touch e.g. isopropanol or denatured alcohol with your lips.
The carcasses are then donned one at a time, and the hatch closed each time. So that the printer detects one of them and reduces the list of undetected inks in the program window.
In my case, the printer was no longer showing error 1403, but the error kept returning when it went to the pampers. So I took the printer apart. Watch out for the little yellow wire on the left side which is the sensor on one of the printer covers - so it won't break off. I decided to use a multimeter to measure the electrical resistance of the ink, the ink on the nappy, and it happens that the ink is electrically conductive. Therefore, I washed with Strong blue preparation, to clear the ink heads, all the pampers mechanics - white plastic slightly turned upwards, two transparent rubbers that must be responsible for washing the heads - cleaning, two diapers - a white cube and a gray oblong, whose colors came back after washing and draining and rinsing them, and plastics around. These stained areas with thick, dripping ink smeared and stained the surface of the heads. It appears that the metal sheets the printer prints with are used to read the electrical resistance. The residual ink that will soil the leaves, the surface of the heads, changes the electrical resistance info, the so-called crap, about the temperature on the head or cartridge. Any Canon printer with errors B200, 1403 is repairable in 99%, but the pampers must be clean, like new, and the head is thoroughly blown out after disassembly. And dry everything.
Do not run the printer with the housing removed, with optical sensors illuminated. A 65xx error may appear, which means that the printer's motherboard is damaged. Close the printer. From the latches, you need to unclip the left side of the plastic housing to connect a small yellow cable. This printer has several sensors from the flap, because it prints both photos and CDs / DVDs, etc.
PS. I don't use isopropanol, but white denatured alcohol. Purple, he's bad.
Added after 6 [minutes]:
The electrical resistance of the used Tell Force One replacement carcasses is on average 400Kohm, 800Kohm, up to 1200Kohm and is a floating resistance. The ink resistance in the original Canon black cartridges in the black opaque casing is the resistance in the range of 1600-1800kohm to "0L", so the resistance is outside the 2M range on the ohmmeter. It is a non-floating, more constant resistance.
I do not know why the error 1403, and five flashes of the diode, should signal a problem with the temperature sensor, since the fault lies elsewhere.
Let me start with the fact that you need to remove the printhead. Pull the housing of the printhead and carriage seat toward you, next to the ink tanks, to snap off the plastic arm with the clicks.
Disassemble the head - two silver screws. We remove the rubber pad inside. Below it are micro-holes terminated with flex tape heads. A rubber pad is put on the protruding black tunnels - grooves through which the ink escapes. Blow the head with your mouth. Until we blow out the ink that will be on the metal plates in the form of drops. We clean both sides with the Strong blue preparation, for unclogging the heads, and blow again. Watch out for possible "burns" of the lips with chemical preparations. Do not touch e.g. isopropanol or denatured alcohol with your lips.
The carcasses are then donned one at a time, and the hatch closed each time. So that the printer detects one of them and reduces the list of undetected inks in the program window.
In my case, the printer was no longer showing error 1403, but the error kept returning when it went to the pampers. So I took the printer apart. Watch out for the little yellow wire on the left side which is the sensor on one of the printer covers - so it won't break off. I decided to use a multimeter to measure the electrical resistance of the ink, the ink on the nappy, and it happens that the ink is electrically conductive. Therefore, I washed with Strong blue preparation, to clear the ink heads, all the pampers mechanics - white plastic slightly turned upwards, two transparent rubbers that must be responsible for washing the heads - cleaning, two diapers - a white cube and a gray oblong, whose colors came back after washing and draining and rinsing them, and plastics around. These stained areas with thick, dripping ink smeared and stained the surface of the heads. It appears that the metal sheets the printer prints with are used to read the electrical resistance. The residual ink that will soil the leaves, the surface of the heads, changes the electrical resistance info, the so-called crap, about the temperature on the head or cartridge. Any Canon printer with errors B200, 1403 is repairable in 99%, but the pampers must be clean, like new, and the head is thoroughly blown out after disassembly. And dry everything.
Do not run the printer with the housing removed, with optical sensors illuminated. A 65xx error may appear, which means that the printer's motherboard is damaged. Close the printer. From the latches, you need to unclip the left side of the plastic housing to connect a small yellow cable. This printer has several sensors from the flap, because it prints both photos and CDs / DVDs, etc.
PS. I don't use isopropanol, but white denatured alcohol. Purple, he's bad.
Added after 6 [minutes]:
The electrical resistance of the used Tell Force One replacement carcasses is on average 400Kohm, 800Kohm, up to 1200Kohm and is a floating resistance. The ink resistance in the original Canon black cartridges in the black opaque casing is the resistance in the range of 1600-1800kohm to "0L", so the resistance is outside the 2M range on the ohmmeter. It is a non-floating, more constant resistance.
