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Fauly Code 73 on gas boiler

  • 09-11-2013 4:20pm
    #1
    V.W.L 11
    Closed Accounts Posts: 1,586 ✭✭✭


    Fault Code 73: what does this code mean


Comments

  • #2
    Egass13
    Registered Users, Registered Users 2 Posts: 1,056 ✭✭✭Egass13


    Boiler make/model please?


  • #3
    V.W.L 11
    Closed Accounts Posts: 1,586 ✭✭✭V.W.L 11


    Egass13 wrote: »
    Boiler make/model please?

    its a VOKERA MYNUTE HE,when the boiler is fired up it stops working after a few minutes then flashes that code,its on standby now and has number 24 on it,all help much appreciated


  • #4
    Egass13
    Registered Users, Registered Users 2 Posts: 1,056 ✭✭✭Egass13


    73 is a return thermistor fault , you will need to get an rgi to take a look as it's not a DIY job , post up your area and one of the fine service engineers here should be able to help you out


  • #5
    V.W.L 11
    Closed Accounts Posts: 1,586 ✭✭✭V.W.L 11


    Egass13 wrote: »
    73 is a return thermistor fault , you will need to get an rgi to take a look as it's not a DIY job , post up your area and one of the fine service engineers here should be able to help you out

    i'm based in cork city,the thermostat is f**ked so is it???what would that cost to fix??!


  • #6
    Egass13
    Registered Users, Registered Users 2 Posts: 1,056 ✭✭✭Egass13


    A thermistor isn't a thermostat, it's a temperature sensor inside the boiler. If it's the problem they aren't too expensive, but it might be another problem that is causing the fault to occur , only way to know is too have it looked at by a competent engineer


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  • #7
    V.W.L 11
    Closed Accounts Posts: 1,586 ✭✭✭V.W.L 11


    Egass13 wrote: »
    A thermistor isn't a thermostat, it's a temperature sensor inside the boiler. If it's the problem they aren't too expensive, but it might be another problem that is causing the fault to occur , only way to know is too have it looked at by a competent engineer

    would it be normal to run for 10-15 minutes and then cut out because of this issue???


  • #8
    Egass13
    Registered Users, Registered Users 2 Posts: 1,056 ✭✭✭Egass13


    It would be because it could take this long for the temperature anomaly to occur , your problem is why it is happening , could be a circulatory issue or it could be a straight forward thermistor fault .


  • #9
    shane0007
    Closed Accounts Posts: 4,677 ✭✭✭shane0007


    If the NTC was giving an incorrect resistance reading back to the pcb, the pcb thinks the boiler is running at a hotter temperature than actually is. It would then be receiving a different resistance from other ntc's so it knows the reading from the return is faulty. When cool, it reads correct.


  • #10
    V.W.L 11
    Closed Accounts Posts: 1,586 ✭✭✭V.W.L 11


    shane0007 wrote: »
    If the NTC was giving an incorrect resistance reading back to the pcb, the pcb thinks the boiler is running at a hotter temperature than actually is. It would then be receiving a different resistance from other ntc's so it knows the reading from the return is faulty. When cool, it reads correct.

    so it'll keep cutting in and out until fixed???!!


  • #11
    shane0007
    Closed Accounts Posts: 4,677 ✭✭✭shane0007


    V.W.L 11 wrote: »
    so it'll keep cutting in and out until fixed???!!

    Yup.
    Call in a RGI. They can test the resistance at the fail point & compare it to the actual temperature of the return. This will confirm that it is the NTC that is at fault. If this is not the fault, they can test the other associated components to diagnose.


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