I have an ISAR HE24 boiler that has been throwing up a H3 error randomly over the past week or so , the error seems to disappear by itself , resetting or turning off and on does nothing. It just comes back to life. so sporadically we are without hot water until it decides to work. can be minutes or hours.
The H3 relates to the DHW thermistor , and i know this can be changed , but what is also happening is when the heating is on the pressure gauge reaches to just over 2 1/2 bar , sometimes close to 3 , and is weeping out the overflow (copper pipe, not the plastic one) onto the patio.
are these 2 things related ?
what should the pressure be with heating on ?
cheers
The H3 relates to the DHW thermistor , and i know this can be changed , but what is also happening is when the heating is on the pressure gauge reaches to just over 2 1/2 bar , sometimes close to 3 , and is weeping out the overflow (copper pipe, not the plastic one) onto the patio.
are these 2 things related ?
what should the pressure be with heating on ?
cheers