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Boiler heats the house but not the water!

ColdMainer
ColdMainer Member Posts: 8
edited December 2023 in Oil Heating
It's actually my sister place. I'm trying to help her out. The boiler heats her house just fine but as far as it heating her water it comes out hot up until the very first 90 degree fitting on the tubing right there at the boiler. She noticed taking showers there would be dips in temperature. Its now cold before it even reaches the mixing valve. She replaced the TMV mixing valve just in case but to no avail. 

Any tips at all would be very much appreciated. 

Comments

  • pecmsg
    pecmsg Member Posts: 5,277
    Where is this boiler located?
  • pedmec
    pedmec Member Posts: 1,059
    Try descaling the tankless coil. could be slimed up
    ColdMainerCLamb
  • ColdMainer
    ColdMainer Member Posts: 8
    pecmsg said:
    Where is this boiler located?
    It's in her basement
  • ColdMainer
    ColdMainer Member Posts: 8
    pedmec said:
    Try descaling the tankless coil. could be slimed up
    Okay I'll look into that one
  • ColdMainer
    ColdMainer Member Posts: 8
    Alright I figured out that the new TMV mixing valve has to be adjusted under the cap for it to work.  Issue really was a bad mixing valve. Thanks guys.
    CLamb

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