Heatilator CD4842IR no longer works

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rogerdodger

New Member
Sep 24, 2021
2
PA
Hey everybody!

We have a Heatilator CD4842IR installed in our home. I meant to fix it last year but other projects got in the way.

Last year, I could somewhat consistently get the pilot to light with the wall switch and get consistent spark. Today, she sparked once then nothing at all. I made sure the gas shutoff valve was in the 'on' position.

Any and all opinions would be greatly appreciated, thanks for your time.
 

DAKSY

Full Time RVer
Staff member
Dec 2, 2008
9,631
Wherever we're parked
Unplug the transformer from the junction box underneath the fire box.
Put 2 'D' batteries in the harness. Does the unit spark when you hit the switch?
 
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rogerdodger

New Member
Sep 24, 2021
2
PA
Wow, that did the trick! Never seen it spark like that before. Fireplace turns on consistently now too! Plugging the transformer back in did not change anything. I guess we can mark this as solved?
 

DAKSY

Full Time RVer
Staff member
Dec 2, 2008
9,631
Wherever we're parked
Wow, that did the trick! Never seen it spark like that before. Fireplace turns on consistently now too! Plugging the transformer back in did not change anything. I guess we can mark this as solved?
Maybe. The transformer may be ready to crap out. At least you know that you can run the unit on batteries if it does. Might want to ask around to see where you can get a new one.